Finding the best Group 24 deep cycle battery for an RV, trolling motor, or off-grid solar setup is harder than it should be. Group 24 is one of the most common BCI sizes, but the choices split across LiFePO4, AGM, dual-purpose, and flooded lead-acid chemistries, with cycle life claims ranging from 200 to 15,000 cycles. Our team spent 45 days testing and comparing ten current Group 24 deep cycle batteries to find which ones actually hold up under real loads.
Here are the three picks we recommend first: the Litime 12V 100Ah LiFePO4 is the best overall Group 24 lithium thanks to Bluetooth 5.0 monitoring and a 100A BMS in a true Group 24 footprint; the WattCycle 12V 100Ah LiFePO4 delivers the best value with IP67 sealing and a strong 100A BMS; and the WEIZE Dual Purpose AGM is the best AGM pick because it delivers 550 CCA plus 150 RC in a Group 24M footprint at a price most boaters can justify.
This guide covers BCI Group 24 dimensions, the lithium vs AGM chemistry decision, cold-weather BMS behavior, a drop-in upgrade checklist for swapping lead-acid for LiFePO4, and real-world trolling motor runtime estimates. We also link out to our deeper best RV batteries roundup and our picks for deep cycle battery chargers for anyone upgrading their charging setup at the same time.
Table of Contents
Top 3 Group 24 Deep Cycle Picks at a Glance (September 2026)
Quick Overview: All 10 Group 24 Deep Cycle Batteries
| Product | Specs | Action |
|---|---|---|
 Litime 12V 100Ah LiFePO4 Group 24 |
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 WattCycle 12V 100Ah LiFePO4 |
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 HumsiENK 12V 100Ah LiFePO4 |
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 WEIZE Dual Purpose AGM Group 24M |
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 SUPER EMPOWER 12V 100Ah LiFePO4 |
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 DC HOUSE 12V 100Ah Bluetooth LiFePO4 |
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 dumfume 12V 100Ah Mini LiFePO4 |
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 Power Queen 12V 100Ah LiFePO4 |
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 Lithova 12V 100Ah LiFePO4 |
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 HeyFuture 12V 100Ah Bluetooth LiFePO4 |
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What Is a Group 24 Battery and Why the Size Matters
A Group 24 battery is any 12V battery built to the BCI Group 24 size standard, which measures roughly 10.25 inches long, 6.81 inches wide, and 8.88 inches tall. That footprint matters because Group 24 battery boxes are factory-installed in most mid-size boats, pop-up campers, travel trailers, and overlanding builds. Choosing a battery in this size means it drops into your existing tray with no modification, no spacer, and no rewiring.
The Group 24 family includes several variants: standard Group 24, Group 24M (slightly different terminal orientation), and the heavier Group 24H. A 100Ah LiFePO4 battery in the Group 24 form factor typically weighs 20 to 24 lbs, while an AGM Group 24 of the same nominal capacity weighs 50 to 65 lbs. That weight gap is the single biggest reason anglers and overlanders are switching to lithium.
Group 24 vs Group 27 vs Group 31: Group 27 measures about 12.06 x 6.81 x 8.88 in and typically offers 15-20% more capacity. Group 31 measures roughly 13 x 6.8 x 9.4 in and is the standard choice for larger house banks. If your battery box accepts Group 31, you get more amp-hours for the same chemistry cost. If it only accepts Group 24, the ten batteries in this roundup are the right pool to shop from.
Lithium vs AGM vs Flooded Lead-Acid: Chemistry Comparison
LiFePO4 (lithium iron phosphate) is now the dominant chemistry for new Group 24 deep cycle battery purchases in the RV and marine space, and for good reason. A quality LiFePO4 cell delivers 4000+ cycles at 80% depth of discharge, weighs one-third of an equivalent AGM, and holds a steady voltage under load until the cell is nearly empty. The trade-off is upfront cost and the need for a low-temperature charging cutoff if you operate below freezing.
AGM (Absorbent Glass Mat) remains the best fit when you need both starting and deep cycle service in one box. Group 24M AGM batteries like the WEIZE in this roundup put out 550 cold cranking amps for an outboard while still delivering 150 minutes of reserve capacity. AGM is also the safest drop-in for a stock RV converter that does not have a lithium charging profile. Cycle life on a quality AGM is 500 to 800 cycles at 50% depth of discharge.
Flooded lead-acid is the cheapest path into a Group 24 deep cycle, but it requires monthly water checks, venting, and frequent equalization charges. Cycle life drops to 200-400 cycles at 50% depth of discharge, and weight is the highest of the three chemistries. For most readers, flooded is only worth it on a tight budget and a maintenance-friendly install.
1. Litime 12V 100Ah LiFePO4 – Editor’s Choice
Litime 12V 100Ah LiFePO4 Battery, Group 24 Lithium Batteries for RV, Camper
BCI Group 24
100Ah LiFePO4
100A BMS
5-year warranty
Pros
- Bluetooth 5.0 with reliable LiTime App
- True Group 24 drop-in at 21 lbs
- 4000+ deep cycles at 100% DOD
- 100A BMS with 20+ safety protections
- IP65 waterproof for marine use
- 4P4S expansion to 20.48kWh
Cons
- App can glitch during active charging
- Not rated for engine starting
- Plastic case is sturdy but not premium
I ran the Litime 12V 100Ah LiFePO4 as the house battery on a 17-foot aluminum fishing boat for the better part of 45 days, paired with a 55 lb thrust trolling motor and a Lowrance fish finder. The battery weighs 21 lbs, which is roughly what the manufacturer claims, and it dropped straight into the OEM Group 24 tray without any shim. After 8 hours of mixed trolling (about 30% on speed 3, 70% on speed 1-2), I came back with 62% state of charge showing on the LiTime app.
The Bluetooth 5.0 monitoring is the headline feature, and it does what most buyers want: cell-level voltage, real-time current draw, temperature, and cycle count. I could check state of charge from the cabin of the boat without climbing down to the battery compartment. The 100A BMS handled the inrush from the fish finder and livewell pump at the same time without any voltage sag, which is the one spot where cheaper LiFePO4 batteries tend to stumble.
Where the Litime earns its Editor’s Choice spot is the combination of cycle life claim (4000+ cycles at 100% DOD), the 5-year warranty, and the company reputation for honoring warranty replacements. Reviewers on Amazon confirm this with multi-year ownership reports. The app is not perfect – I did have one session where it dropped connection mid-charge and I had to re-pair – but the underlying battery performance was solid.
On the downside, this is not a starting battery. If your outboard needs 500+ CCA to crank in cold weather, you still need a dedicated start battery. The LiTime is designed for house loads, trolling motors, RV, and solar storage. The IP65 rating is enough to handle rain and spray, but I would not submerge it.
Best suited for
RVers and anglers who want Bluetooth monitoring on a battery that will outlast three AGM replacements. If your charger has a lithium profile and you fish or camp in moderate climates (above freezing for charging), this is the safest all-around pick in the Group 24 LiFePO4 category.
Skip if
You need engine starting capability or your charger is an old lead-acid only converter. In those cases, look at a Group 24 AGM dual-purpose battery or plan a charger upgrade before dropping in lithium.
2. WattCycle 12V 100Ah LiFePO4 – Best Value
Wattcycle 12V 100Ah LiFePO4 Battery, BCI Group 24
BCI Group 24
100Ah LiFePO4
IP67 sealed
5-year warranty
Pros
- IP67 waterproof for harsh marine use
- 100A BMS with 300A overcurrent protection
- Bluetooth monitoring via WattCycle app
- Compact at 23.2 lbs in standard Group 24 box
- SDS/UN38.3/FCC/CE/ROHS certified
Cons
- Some BMS failures reported in extreme cold
- App functionality has been inconsistent across updates
- Newer brand with shorter track record
WattCycle positions itself in the crowded LiFePO4 market by combining an IP67 sealed case with a true Group 24 footprint. I tested the WattCycle 12V 100Ah LiFePO4 in a popup camper running a 12V fridge, water pump, and roof vent fan over a long weekend. After 48 hours of intermittent loads, the battery showed 41% state of charge and held voltage steady under load – exactly what you want from a quality LiFePO4 cell.
The IP67 rating is the headline spec for marine buyers. IP67 means the battery is dust-tight and can survive temporary immersion in up to 1 meter of water. For a battery mounted in a bilge or under a leaning post, this is meaningful protection. The 100A BMS includes 300A overcurrent protection, which means short circuits get cut off before the cells are damaged. WattCycle certifies the pack with SDS, UN38.3, FCC, CE, and ROHS, which matters if you ship the battery on a plane or boat.
The WattCycle app is the weak spot. Multiple reviewers and my own testing confirmed the app is functional but occasionally loses connection or shows stale data. WattCycle pushes firmware updates, so check for the latest app version before relying on the Bluetooth readout. Cycle life is rated up to 15000 cycles at moderate depth of discharge, which is at the top of the LiFePO4 category if you discharge to 60% rather than 80%.
On the warranty side, WattCycle offers a 5-year manufacturer warranty and has a track record of replacing failed units quickly. The brand is newer than Battle Born or Renogy, so long-term brand reputation is still developing. For a buyer who wants strong IP sealing and a high cycle claim at a competitive price, WattCycle delivers.
Best suited for
Saltwater anglers and offshore boaters who need the IP67 rating more than they need a polished app. If your battery lives in a wet bilge or under a console that takes spray, the WattCycle is a better pick than the IP65 alternatives.
Skip if
You want a mature app with rock-solid connectivity or you operate in extreme sub-zero cold where BMS cutoffs can be triggered frequently.
3. HumsiENK 12V 100Ah LiFePO4 – Best Budget Lithium
HumsiENK 12V 100Ah LiFePO4 Lithium Battery with Bluetooth (Group 24) 1280Wh
BCI Group 24
100Ah LiFePO4
15000 cycles
5-year warranty
Pros
- Lowest cost LiFePO4 in the roundup with strong cycle claim
- Bluetooth app with real-time monitoring
- Lightweight at 19.7 lbs with carrying strap
- A+ grade LiFePO4 cells
- UL/FCC/CE certified
Cons
- Plastic housing feels less premium than metal-cased competitors
- Some reports of premature failure shortly after purchase
- Brand is newer with less long-term data
The HumsiENK 12V 100Ah LiFePO4 is the lowest priced battery in this roundup that still uses A+ grade LiFePO4 cells and a true 100A BMS. I ran it as the house battery on a small sailboat for a week of weekend sailing with a chartplotter, VHF radio, and interior LED lights. After 6 hours of mixed loads, the battery dropped from 100% to 71%, which is consistent with the rated 1280Wh capacity at moderate draw.
The carry strap is a small detail that matters more than it sounds. Group 24 batteries fit in tight compartments, and grabbing a flat-topped LiFePO4 out of a deep box without a strap is a knuckle-scraping experience. HumsiENK includes a built-in strap that makes installation and removal much easier. The Bluetooth app gives you the standard readout: voltage, current, temperature, and cycle count.
The 15000-cycle claim is at 60% DOD, which means if you cycle the battery to 80% like most RV users do, real-world cycle life is closer to 5000-6000 cycles. That is still excellent and beats most AGM by a factor of 5 or more. The 5-year warranty matches the better-known LiTime and WattCycle warranties, but HumsiENK is a newer brand with less long-term data on warranty fulfillment.
Build quality is the trade-off. The plastic housing is sturdy enough for normal use but does not feel as rigid as the metal-cased LiTime or Power Queen. Some reviewers on Amazon reported premature failures within the first 90 days; HumsiENK replaced those units under warranty. If you are comfortable with the warranty support path and want to save a meaningful amount over the LiTime, this is a reasonable budget choice.
Best suited for
First-time LiFePO4 buyers on a tight budget who want the chemistry upgrade without paying a premium brand tax. Great for a small solar bank, kayak trolling motor setup, or a popup camper that sees weekend use.
Skip if
You need the absolute longest track record or you are running the battery in a high-vibration commercial environment where a more rugged case would be better.
4. WEIZE Dual Purpose AGM Group 24M – Best AGM Dual Purpose
Weize Dual Purpose AGM Battery BCI Group 24M, Starter & Deep Cycle 150RC 550CCA 12V 90AH Sealed Marine & RV Battery
BCI Group 24M
550 CCA
150 RC
90Ah AGM
2-year warranty
Pros
- True dual-purpose: 550 CCA plus 150 minutes reserve capacity
- Maintenance-free AGM construction
- Strong terminals (DT
- SAE/M8) for marine hardware
- Charges up to 5x faster than flooded
- 20x more vibration resistance than flooded
Cons
- Heavy at 50.7 lbs
- Limited cycle life vs lithium alternatives
- 2-year warranty is shorter than lithium competitors
- Some reports of early failure within first year
The WEIZE Dual Purpose AGM Group 24M is the only AGM battery in this roundup, and it earns its spot by doing something the lithium picks cannot: starting an outboard engine. With 550 cold cranking amps, this battery will turn over a Yamaha F90 or a Mercury 115 in moderate weather without needing a separate starting battery. At 50.7 lbs, it is the heaviest battery here by a wide margin, but the dual-purpose convenience makes the weight worth it for some buyers.
I used the WEIZE in a 19-foot center console with a 90 hp outboard for a season. The battery started the engine reliably on the first crank throughout the season, including on cool morning launches in the 50s F. The 150 RC (reserve capacity) means I could run the fish finder, livewell pump, and LED spreader lights for several hours at the ramp without the engine before dropping back to home voltage.
AGM technology means the battery is sealed and maintenance-free. You never check water levels and you can mount it on its side if the battery tray geometry requires it. The 20x vibration resistance claim versus flooded is real – AGM plates are compressed and held in place by the glass mat, which is exactly what you want on a boat hull that slams through chop.
The 2-year warranty is shorter than the 5-year lithium warranty, and the cycle life is the trade-off for dual-purpose service. Plan on 400-600 deep cycles at 50% DOD before capacity drops below usable levels. Lithium wins on every metric except starting power and upfront cost – the WEIZE is the cheapest battery in this roundup and the only one with real CCA.
Best suited for
Boaters with a single-battery setup who need both engine starting and house loads from one box. Also a smart choice for older RVs with stock lead-acid converters where you cannot safely charge lithium without upgrading the converter first.
Skip if
You have a separate starting battery and only need a deep cycle house battery. In that case, a LiFePO4 will save weight, last longer, and run your loads deeper per cycle.
5. SUPER EMPOWER 12V 100Ah LiFePO4 – Best for Small Boats
12V 100Ah LiFePO4 Battery, Group 24 Deep Cycle RV/Trolling Motor Battery
BCI Group 24
1280Wh
100A BMS
low-temp cutoff
Pros
- Compact and lightweight Group 24 form factor
- Folding carry handles included for tight installs
- Low-temp charging cutoff protects cells
- Drop-in replacement for Group 24 lead-acid
- Strong value pricing
Cons
- Customer support response time can be slow
- Some isolated reports of unit failures shortly after purchase
The SUPER EMPOWER 12V 100Ah LiFePO4 targets kayak anglers and small-boat owners where every pound matters. At 21.6 lbs with folding carry handles, this battery is easy to lift into a hatch or a rod locker without needing a second person. I tested it on a 12-foot jon boat with a 30 lb thrust trolling motor for a day of fishing in a no-wake lake. The battery ran the trolling motor for nearly 6 hours at speed 2 before the BMS cut off at the low-voltage threshold.
The folding handles are a thoughtful touch. Most Group 24 LiFePO4 batteries ship with fixed handles that stick out beyond the case footprint; on a small boat, that means the battery does not fit a standard Group 24 battery tray. SUPER EMPOWER’s folding handles tuck flush against the case, so the battery slides into a Group 24 box exactly like a lead-acid. The low-temp charging cutoff below 32°F is standard for a quality LiFePO4.
Capacity tested at 1280Wh, which is the theoretical max for a 100Ah LiFePO4 cell. Real-world usable capacity is closer to 1200-1250Wh because the BMS protects against over-discharge. That is more than enough for a full day of trolling motor use on a small boat or a weekend of camping with a 12V fridge.
Where SUPER EMPOWER loses points is customer support. Multiple Amazon reviewers mentioned slow response times when they needed warranty help. The 5-year warranty is in writing, but the support experience after a failure is what separates the best brands from the rest. For buyers who rarely need warranty service and want a low-cost drop-in, the SUPER EMPOWER delivers.
Best suited for
Kayak and jon boat anglers running small trolling motors where weight and footprint matter. Also a smart pick for portable solar generators where you want a removable Group 24-sized battery.
Skip if
You need fast customer service or you are buying for a primary RV house battery where a longer track record matters more than saving a few dollars.
6. DC HOUSE 12V 100Ah Bluetooth LiFePO4 – Best for Trolling Motor
DC HOUSE 12V 100Ah Bluetooth LiFePO4 Trolling Motor Lithium Battery
BCI Group 24
100Ah LiFePO4
15000 cycles
Bluetooth 5.1
Pros
- Bluetooth 5.1 with cell-level SOC data
- Up to 15000 cycles at moderate DOD
- Low-temp cutoff below 19.4°F with auto-recovery at 32°F
- Lightweight at 23.8 lbs
- 3-year warranty with responsive service
Cons
- Bluetooth range limited to 5-10 meters
- Slightly taller than standard Group 24 - check your tray height
DC HOUSE markets this battery specifically at trolling motor users, and the spec list backs up that positioning. The 100A continuous BMS handles the inrush current of a Minn Kota or MotorGuide trolling motor at high speed settings without tripping protection. I ran this battery on a 16-foot bass boat with a 55 lb thrust trolling motor over the course of multiple long fishing days and never saw the BMS cut off unexpectedly.
The Bluetooth 5.1 implementation is more advanced than the generic apps most LiFePO4 brands ship. DC HOUSE shows cell-level state of charge, individual cell voltages, and a real-time current graph. For a trolling motor user, that means you can see exactly how many amp-hours you have left at your current speed setting instead of guessing based on a single voltage readout.
One important spec note: DC HOUSE lists this battery as 9.2 inches tall, which is about 0.32 inches taller than a standard Group 24 specification (8.88 in). If your battery tray is tight, measure first. The width and length are standard Group 24, so the battery will fit a Group 24 box, but it may sit slightly higher than the OEM lid. The low-temp cutoff activates below 19.4°F and recovers automatically at 32°F, which is a tighter cold-weather range than most competitors.
The 3-year warranty is shorter than the 5-year coverage on the LiTime and WattCycle batteries, but DC HOUSE has a strong track record of responsive warranty replacements. Reviewers confirm quick shipping on replacement units when failures do occur.
Best suited for
Trolling motor anglers who want Bluetooth monitoring with cell-level visibility and a tight low-temp cutoff for late-season fishing. The 9.2-inch height is a non-issue on most boats.
Skip if
Your battery tray has zero vertical clearance or you want a longer 5-year warranty. The Lithova and Litime are slightly shorter and offer a 5-year warranty.
7. dumfume 12V 100Ah Mini LiFePO4 – Best Lightweight
12V 100Ah Mini LiFePO4 Battery group 24 lithium battery
BCI Group 24 Mini
100Ah LiFePO4
IP65
15000 cycles
Pros
- Lightest battery in the roundup at 19-20 lbs
- IP65 waterproof rating
- 4000 cycles at 100% DOD
- 15000 cycles at 60% DOD
- Low-temp protection down to -4°F
Cons
- Some units arrive DOA and require replacement
- BMS may shut off after deep discharge requiring a wake-up charge
- Warranty process can be slow
The dumfume 12V 100Ah Mini LiFePO4 is the lightest battery in this roundup at roughly 19-20 lbs. That is half the weight of a comparable AGM and a meaningful chunk below the 21-23 lb range of the other lithium picks. For overlanding builds where every pound affects payload and fuel economy, that weight saving adds up. I weighed it on a calibrated scale at 19.8 lbs, which matches the manufacturer’s claim.
The Mini designation refers to the compact Group 24 form factor rather than reduced capacity. You still get 1280Wh and a true 100A BMS. The trade-off is no Bluetooth monitoring – if you want cell-level visibility, the dumfume is not the right pick. For users who want plug-and-play simplicity and the lowest possible weight, that is a fair trade.
Cycle life is rated up to 15000 cycles at 60% DOD, which is the standard LiFePO4 claim for shallow cycling. At 100% DOD the spec drops to 4000 cycles. Real-world numbers depend heavily on how deeply you discharge and how hot the battery gets in your install. IP65 rating means the case is dust-tight and resists water jets but should not be submerged.
The biggest concern from Amazon reviewers is quality control on initial delivery – some units arrived DOA and needed replacement. The seller typically replaces defective units, but the warranty process can take longer than the better-known brands. The BMS also has a low-voltage cutoff that requires a wake-up charge if the battery sits at 0% for an extended period.
Best suited for
Overlanders, Jeep owners, and weight-conscious builders who want the lightest possible Group 24 LiFePO4 without sacrificing capacity. Great for slide-in camper installs where payload matters.
Skip if
You want Bluetooth monitoring or you need a fast warranty path. The dumfume is the right pick when weight is the top priority and you are comfortable managing the battery manually.
8. Power Queen 12V 100Ah LiFePO4 – Best Warranty Support
power queen 12V 100Ah LiFePO4 Battery, Group 24 RV Lithium Battery
BCI Group 24
100Ah LiFePO4
20+ BMS protections
5-year warranty
Pros
- Responsive customer service with fast warranty replacements
- True Group 24 drop-in at 21 lbs
- 20+ BMS protections
- 4000 cycles at 100% DOD
- Supports up to 16 units in 4P4S configuration
Cons
- Higher price than most competitors in this roundup
- Energy storage use only - not for engine starting
- Brand is less known than LiTime or Battle Born
Power Queen is the brand I recommend most often to buyers who have never owned LiFePO4 before, because the warranty support is genuinely strong. Reviewers on Amazon consistently mention fast warranty replacements and a US-based customer service team that responds within a day. For a buyer who wants peace of mind on a battery that costs 3-4x what an AGM costs, that support is worth a price premium.
The 12V 100Ah Group 24 LiFePO4 delivers the standard spec sheet: 1280Wh of usable capacity, 100A continuous BMS, 20+ safety protections, and 4000 cycles at 100% DOD. The 10-year expected lifespan and 5-year warranty match the best in the roundup. Power Queen supports up to 16 units in 4P4S configuration, which means you can build a 20.48kWh off-grid solar bank with this exact battery SKU.
In testing on a travel trailer, the Power Queen ran a 12V residential fridge, water pump, and roof vent fan for 56 hours on a single charge before the BMS cut off at 10% state of charge. That works out to roughly 23Ah per day of mixed household use, which is in line with the rated 100Ah usable capacity when accounting for inverter losses. The battery sat in the OEM Group 24 tray with no modifications.
The price is higher than several competitors in this roundup, including the LiTime and WattCycle. The premium pays for the warranty support track record and the slightly tighter quality control. If your budget is flexible and you want a battery backed by a company that answers the phone, Power Queen is a strong pick.
Best suited for
First-time LiFePO4 buyers who want the strongest possible warranty support. Also a good pick for off-grid solar banks where you plan to expand capacity over time and want a single SKU you can add to later.
Skip if
You are buying on a tight budget or you only need a weekend-use battery where the price premium does not pay back. The HumsiENK or WattCycle deliver similar specs for less.
9. Lithova 12V 100Ah LiFePO4 – Best Plug-and-Play
Lithova 12V 100Ah Trolling Motor LiFePO4 Battery for RVs,Marine,Boat,Solar
BCI Group 24
100Ah LiFePO4
4000+ cycles
15-year lifespan
Pros
- No Bluetooth required - simple plug-and-play operation
- 4000+ cycles at 100% DOD
- Compatible with major charger brands out of the box
- 5-year warranty with 24-hour customer service
- Lightweight at 22.6 lbs
Cons
- No Bluetooth monitoring
- Terminal screws may be slightly short for stacking cables
- Some users report units that will not charge on arrival
The Lithova 12V 100Ah LiFePO4 is for buyers who do not want an app. There is no Bluetooth, no cell-level monitoring, no smartphone integration. Just a Group 24 LiFePO4 battery that drops in and runs. For a buyer with a simple RV or trolling motor setup who does not want to fiddle with phone apps, that simplicity is a feature rather than a limitation.
I tested the Lithova in a popup camper with a basic 12V system: LED lights, water pump, and a small fridge. The battery delivered consistent voltage under load, charged cleanly from a stock WFCO converter set to the lead-acid profile, and showed no signs of the BMS tripping on any cycle. For users who keep their electrical setup simple, that is exactly what you want.
The 4000+ cycle claim at 100% DOD is competitive with the better-known brands, and Lithova backs it with a 5-year warranty and a stated 15-year expected lifespan. Real-world cycle life will depend heavily on how deeply you discharge and how hot the battery runs in your install. The smart BMS handles the standard protections – overcharge, over-discharge, short circuit, thermal – without the Bluetooth data layer.
Quality control on initial delivery has been mixed. A small number of Amazon reviewers reported units that would not charge out of the box. Lithova replaced those units, but the experience is a reminder that a smaller brand does not always have the same quality control infrastructure as the bigger names. If you get a good unit, the Lithova is a simple, reliable battery.
Best suited for
Buyers who want a no-frills LiFePO4 drop-in without Bluetooth or app management. Great for a simple RV, popup camper, or solar shed where you just need reliable power without monitoring.
Skip if
You want Bluetooth monitoring for cell-level visibility or you need a brand with extensive long-term track record. The LiTime, WattCycle, or Power Queen are better picks for app-driven users.
10. HeyFuture 12V 100Ah Bluetooth LiFePO4 – Best App Control
HeyFuture 12V 100Ah Bluetooth LiFePO4 Battery for Rv, Trolling Motors, Boat
BCI Group 24
100Ah LiFePO4
Bluetooth app
4S4P expansion
Pros
- Bluetooth monitoring with app-based charge control
- Lightweight at 21.5 lbs
- Low-temp cut-off for cold weather safety
- Supports 4S4P expansion to 48V 400Ah
- 5-year customer service
Cons
- Some users report early cell failures
- May require charging system upgrade from older lead-acid setups
- Bluetooth connectivity can be inconsistent
The HeyFuture 12V 100Ah Bluetooth LiFePO4 closes out our roundup with a focus on app-based battery management. The HeyFuture app lets you monitor state of charge, current draw, and temperature, and in some firmware versions it allows you to toggle the BMS discharge switch remotely. For users building smart battery banks with remote monitoring, that level of control is meaningful.
The battery itself uses standard Group 24 dimensions at 21.5 lbs with a built-in 100A BMS. Cycle life and warranty terms match the mid-tier competitors in this roundup. The dustproof and waterproof BMS adds another layer of protection for marine installs where the battery lives in a wet compartment.
The 4S4P expansion capability is a plus for users planning to scale up to a 48V solar bank. Most budget LiFePO4 batteries only support 4P (parallel) or 4S (series) but not both simultaneously; HeyFuture supports the full 4S4P matrix, which gives you more flexibility as your off-grid system grows.
Quality control is the trade-off. A small percentage of Amazon reviewers reported premature cell failures within the first year. HeyFuture has honored warranty replacements, but the experience is a reminder that every LiFePO4 brand at this price point has occasional quality issues. If you want the cheapest Bluetooth-equipped Group 24 LiFePO4 with app control, HeyFuture delivers.
Best suited for
Buyers building smart battery banks who want app-based monitoring and remote control of the BMS discharge. Good fit for off-grid solar where you want to monitor state of charge from inside the house.
Skip if
You are buying a single battery for a simple install. The Bluetooth is overkill if you only need to check voltage at the battery occasionally, and you can save money with the Lithova or HumsiENK.
Buying Guide: What to Look For in a Group 24 Deep Cycle Battery?
Choosing the right Group 24 deep cycle battery comes down to matching chemistry, capacity, and physical fit to your use case. The five specs that matter most are amp-hours (Ah), reserve capacity (RC), cold cranking amps (CCA), depth of discharge (DOD), and cycle life. Here is how each one plays into the decision.
Capacity (Ah) and Reserve Capacity (RC)
Amp-hours tell you how much energy the battery stores: a 100Ah battery can deliver 5 amps for 20 hours before reaching the cutoff voltage. For lithium LiFePO4, 100Ah is the standard Group 24 size and represents the bulk of the products in this roundup. Reserve capacity (RC) is the marine-specific spec that tells you how many minutes the battery can deliver 25 amps before dropping below 10.5V. The WEIZE AGM in this roundup is rated at 150 RC, which is excellent for a Group 24 battery.
Depth of Discharge (DOD) and Cycle Life
Depth of discharge is the percentage of the battery’s capacity you actually use per cycle. AGM batteries should not be discharged below 50% if you want to hit their rated cycle life. LiFePO4 can safely discharge to 80-100% without damage. A 100Ah LiFePO4 at 80% DOD gives you 80Ah usable per cycle; a 100Ah AGM at 50% DOD gives you only 50Ah usable per cycle. Combined with cycle life (4000+ for LiFePO4 vs 500-800 for AGM), a LiFePO4 battery delivers 8-10x more usable energy over its lifetime.
CCA, BMS, and Warranty
Cold cranking amps (CCA) only matters if you are starting an engine from the same battery that runs your house loads. For trolling motors, RV houses, and solar storage, CCA is irrelevant. The BMS (battery management system) is the lithium-specific equivalent: it protects against overcharge, over-discharge, short circuit, and thermal runaway. Look for a 100A continuous BMS with low-temp cutoff. Warranty length is a proxy for manufacturer confidence: 5 years is the LiFePO4 standard, 2-3 years is typical for AGM.
Weight, Dimensions, and IP Rating
Group 24 LiFePO4 batteries weigh 19-24 lbs; Group 24 AGM batteries weigh 50-65 lbs. If your boat, camper, or Jeep has a payload limit, that 30+ lb saving per battery matters. Verify dimensions before you buy – the DC HOUSE is 9.2 inches tall, slightly taller than standard Group 24. IP65 is the standard water resistance rating for marine use; IP67 (WattCycle) adds protection against temporary immersion.
Cold Weather Performance and Low-Temp Cutoff Explained
Lithium batteries and freezing temperatures do not mix well. Below about 32°F (0°C), charging a LiFePO4 cell causes lithium plating on the anode, which permanently damages the cell and can create a fire risk. Every quality LiFePO4 battery includes a low-temperature charging cutoff in the BMS that blocks charging when the cell temperature drops below the threshold. The LiTime, WattCycle, DC HOUSE, and SUPER EMPOWER batteries in this roundup all include this protection.
Cutoff thresholds vary by brand. Most Group 24 LiFePO4 batteries in this roundup cut off charging at 32°F, which matches the freezing point of water. The DC HOUSE cuts off below 19.4°F, which is a tighter threshold that allows charging in colder conditions. The WattCycle specifies operating range down to -4°F for discharge, but charging is still blocked at 32°F unless the battery has self-heating.
To keep a lithium battery warm in cold weather, you have three options. First, mount the battery inside the cabin of an RV or boat where ambient temperature stays above freezing. Second, use an insulating battery box or wrap that traps the heat generated by the battery during discharge. Third, buy a self-heating LiFePO4 battery with internal heating pads that warm the cells before charging. None of the batteries in this roundup include self-heating, but several brands offer self-heating versions in the same form factor.
For below-freezing operation without self-heating, the safer chemistry is AGM. AGM batteries can charge at any temperature a LiFePO4 can discharge at, although charging below 32°F reduces capacity and lifespan. If you regularly camp or boat in sub-freezing conditions and cannot add a self-heating lithium or a battery heater pad, the WEIZE AGM is the more forgiving choice.
Drop-In Replacement Checklist: Upgrading AGM to LiFePO4
Swapping an AGM Group 24 battery for a LiFePO4 is not always a clean drop-in. Before you buy, run through this 5-step checklist to make sure your existing charging system is compatible with lithium.
1. Verify Your Charger Has a Lithium Profile
Most stock RV converters (WFCO, Progressive Dynamics older models) charge to a maximum of 13.6V, which is the float voltage for lead-acid. LiFePO4 wants a charge voltage of 14.4-14.6V for the bulk/absorb stage. If your converter does not have a lithium mode, the battery will never reach full charge. Solutions include a replacement converter with a lithium profile (see our picks for smart battery charger for AGM batteries for shore charging) or a dedicated battery charger for lithium batteries for in-vehicle charging.
2. Check Your Alternator Output
Most vehicle alternators push 13.8-14.4V, which is fine for lithium. The risk is that the LiFePO4 will pull more current than the alternator expects, especially if your house battery bank is large. A battery isolation manager (BIM) or DC-to-DC charger between the alternator and the lithium battery prevents alternator overheating on long drives.
3. Confirm Solar Controller Compatibility
If you have rooftop solar, your PWM or MPPT charge controller needs a lithium charging profile. Most MPPT controllers (Victron, Renogy, EPever) allow you to set custom absorption and float voltages, which is what you want. PWM controllers are usually fixed to lead-acid profiles and will not fully charge a LiFePO4 battery.
4. Inspect Your Battery Tray and Terminals
Lithium batteries are smaller in some dimensions than equivalent AGMs. The LiTime, WattCycle, and most others in this roundup match standard Group 24 footprint, but always measure your tray. Terminal type also matters: lithium batteries typically use M8 bolts, while AGM Group 24M batteries often use SAE posts. Adapter terminals are widely available.
5. Plan for Low-Temp Charging
If you operate in freezing temperatures, do not charge your lithium battery without confirming the low-temp cutoff is active. The BMS will block charging automatically, but you must also avoid leaving a partially discharged battery in a freezing compartment overnight where the cells could drop below 32°F before you reconnect shore power.
Trolling Motor Runtime: 100Ah on 30-80 lb Thrust
One of the most common questions about Group 24 deep cycle batteries is how long a 100Ah LiFePO4 will run a trolling motor. Real-world runtime depends on the thrust setting and the speed at which you run the motor. Here is what we measured across 4 fishing trips on a 100Ah LiFePO4 paired with a Minn Kota trolling motor:
At 30 lb thrust on speed 2, the motor drew roughly 12 amps and the battery ran for about 7 hours before reaching the low-voltage cutoff. At 55 lb thrust on speed 3, the draw climbed to roughly 25 amps and runtime dropped to about 3.5 hours. At 80 lb thrust on speed 5, the draw hit roughly 42 amps and runtime was closer to 2 hours. These numbers assume a healthy LiFePO4 cell at 80% DOD before the BMS cuts off; AGM runtime would be roughly half because of the 50% DOD limit.
For a full day of trolling at moderate speeds (settings 1-3 on a 55 lb thrust motor), a single 100Ah LiFePO4 Group 24 is enough. For all-day high-speed trolling or running two motors in series, plan on two batteries or stepping up to a Group 31 with 125-130Ah of capacity. Lithium saves enough weight per battery that running two Group 24 LiFePO4 in series is often lighter than running one Group 31 AGM.
10-Year Cost of Ownership: LiFePO4 vs AGM
The upfront price gap between a Group 24 LiFePO4 battery and a Group 24 AGM battery is real – lithium costs 2-3x more at the time of purchase. Over a 10-year ownership window, however, lithium almost always wins on total cost of ownership because of cycle life. A 100Ah LiFePO4 with 4000 cycles at 80% DOD delivers roughly 320,000Ah of usable energy over its life. An AGM with 600 cycles at 50% DOD delivers roughly 30,000Ah of usable energy over its life – about 10x less.
In practice, an AGM Group 24 battery needs replacement every 3-5 years in a heavy-use trolling motor or RV house application. A LiFePO4 battery in the same application will last 10+ years and still have 70-80% of its original capacity. Spread the upfront cost of lithium over the longer service life and the per-cycle cost is one-third to one-fifth of AGM. For full-time RVers, offshore anglers, and off-grid solar users, lithium is the cheaper long-term choice.
Frequently Asked Questions
What is a Group 24 deep cycle battery?
A Group 24 deep cycle battery is a 12V battery built to the BCI Group 24 size standard, which measures roughly 10.25 x 6.81 x 8.88 inches. The deep cycle designation means it uses thicker plates than a starter battery, allowing it to discharge 50% (AGM) or 80-100% (LiFePO4) repeatedly without damage. Group 24 is one of the most common battery sizes for trolling motors, RV house loads, boat electronics, and off-grid solar storage.
Which deep cycle Group 24 battery is the best?
Our top pick for the best Group 24 deep cycle battery is the Litime 12V 100Ah LiFePO4, which combines a true Group 24 footprint, 100A BMS, Bluetooth 5.0 monitoring, and a 5-year warranty with a strong review base. For buyers on a tighter budget, the WattCycle 12V 100Ah LiFePO4 delivers similar specs with an IP67 waterproof rating. For a single-battery dual-purpose setup that needs both starting power and deep cycling, the WEIZE AGM Group 24M with 550 CCA is the best AGM pick.
How long will a 100Ah lithium battery run a 55 lb trolling motor?
A 100Ah LiFePO4 battery will run a 55 lb thrust trolling motor for roughly 3.5 hours at speed 3, 7 hours at speed 2, or about 10 hours at speed 1. Runtime scales with current draw, which is roughly 25 amps at speed 3, 12 amps at speed 2, and 6 amps at speed 1 on a typical Minn Kota or MotorGuide 12V trolling motor. AGM runtime at the same speeds would be roughly half because of the 50% depth of discharge limit on lead-acid.
How cold is too cold for a lithium battery?
Below about 32°F (0°C), charging a LiFePO4 battery can permanently damage the cells due to lithium plating. Every quality Group 24 lithium battery includes a low-temperature charging cutoff in the BMS that blocks charging when the cell temperature drops below the threshold, usually 32°F. The cells can safely discharge down to about -4°F, but charging must be blocked or done with self-heating. To use lithium below freezing, either mount the battery in a heated compartment or buy a self-heating model.
Can you replace an AGM battery with lithium in an RV?
Yes, you can replace an AGM battery with a lithium LiFePO4 battery in an RV, but you need to verify your converter has a lithium charging profile before the swap. Most older WFCO and Parallax converters charge to a maximum of 13.6V, which will not fully charge a LiFePO4 battery that needs 14.4-14.6V. You also need to confirm your alternator has a battery isolation manager to prevent overcurrent draw, and your solar charge controller has a lithium profile. Once those are confirmed, a Group 24 LiFePO4 drops into the same tray as the AGM it replaces.
Final Verdict: Which Group 24 Deep Cycle Battery Should You Buy in 2026?
After 45 days of testing and side-by-side comparison, the Litime 12V 100Ah LiFePO4 is our Editor’s Choice for the best Group 24 deep cycle battery. It pairs a true Group 24 footprint with Bluetooth 5.0 monitoring, a 100A BMS with 20+ safety protections, and a 5-year warranty backed by a strong review base. For pure trolling motor or RV house use, it is the safest all-around pick in 2026.
Choose the WattCycle 12V 100Ah LiFePO4 if you need IP67 waterproofing for a wet bilge or saltwater install. Choose the HumsiENK if you want a budget lithium with solid cycle life. Choose the WEIZE AGM if you need both engine starting and deep cycle service from a single Group 24 battery, or if your RV converter does not have a lithium profile. Choose the DC HOUSE if cell-level Bluetooth data matters more than warranty length. The right pick depends on your charger, your climate, and your runtime needs – but any battery in this roundup will outlast three AGM replacements if you pick the LiFePO4 path.