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Stepping up from a tired lead-acid deep-cycle to a lithium-based 24 group marine battery is the single biggest upgrade you can make for a trolling motor, RV house bank, or solar rig. The payoff is immediate: you get 100% usable capacity instead of the 50% rule that governs old AGM batteries, you shave off roughly 30 to 40 pounds per battery, and you stop worrying about water levels, corrosion, or terminal cleaning. But with a dozen brands all claiming 100Ah and Bluetooth, the real question is which one actually holds up under a weekend of trolling or a week of dry camping.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
The difference between a battery that feels dead after a season and one that powers your gear for a decade depends on the BMS, the cell grade, and the cold-weather logic — and the right choice among the 24 group marine battery options below saves you money and frustration from day one.
Our Picks at a Glance
How To Choose The Best 24 Group Marine Battery
Picking a new marine battery used to be simple — you grabbed the heaviest lead-acid box you could lift. Lithium changed that. Now you need to look past the 100Ah sticker and check three things: the BMS (battery management system), the cold-weather behavior, and whether you actually need Bluetooth at all.
BCI Group 24 Size and Fit
Group 24 (BCI Group 24) is a common footprint. But not every “Group 24” lithium battery has the exact same dimensions. Many are slightly taller or narrower than the old lead-acid box you are pulling out. You should measure your tray — especially the height — and compare it against the product’s dimensions before you buy. A battery that is a 0.3 inches too tall may not fit under a boat seat or an RV battery compartment lid.
BMS and Continuous Discharge Rating
The BMS is the brain. For a trolling motor that can pull 30 to 50 amps at full throttle, you want a BMS rated for at least 100 amps continuous. A lower-rated BMS can shut you down mid-cast. The 100A BMS handles peak surges well above that, so your motor does not cut out when you need it most.
Cold Weather Charging Protection
Lithium batteries should not be charged below freezing (32°F / 0°C). A low-temperature cutoff shuts off charging automatically when the cells are too cold and resumes it when they warm up. If you store your boat or RV in a freezing garage or take it out for ice fishing, this feature is non-negotiable. Without it, charging a frozen battery can cause permanent damage at best or failure at worst.
Quick Comparison
| Model | Best For | Capacity (Ah) | Weight (lbs) | BMS (Amps) | Amazon |
|---|---|---|---|---|---|
| Litime Bluetooth 100Ah★ Best Overall | Smart monitoring & long cycle life | 100Ah | 21.9 | 100A | Amazon |
| SUPER EMPOWER 100AhBest Value | Budget-friendly lithium upgrade | 100Ah | 21.6 | 100A | Amazon |
| GrenerPower 100AhTop Rated | High owner satisfaction & small footprint | 100Ah | 22.6 | 100A | Amazon |
| DC HOUSE Bluetooth 100Ah | Trolling motor runtime with Bluetooth | 100Ah | 23.8 | 100A | Amazon |
| HumsiENK Bluetooth 100Ah | Ultra-light portability | 100Ah | 19.7 | 100A | Amazon |
| Weize Dual Purpose AGM | Dual-purpose starting & deep-cycle | 90Ah | 50.7 | N/A | Amazon |
| Power Queen 100Ah | Reliable build and proven support | 100Ah | 21.0 | 20+ protections | Amazon |
| Redodo Bluetooth 100Ah | Premium trolling motor protection | 100Ah | 22.2 | 100A | Amazon |
| LiTime All-Around 100Ah | top-tier battery life reviews | 100Ah | 21.9 | 100A | Amazon |
In‑Depth Reviews
1. Litime 12V 100Ah LiFePO4 Battery Bluetooth, Group 24
Our pick — over 4.5★ from 750+ verified ratings; the strongest balance of quality and price.
The connected lithium pack that owners call a beast for off-grid living.
This is the crowd favorite — and the numbers back it up. The Litime 100Ah uses a 100A BMS (battery management system that handles 1280W continuous and peaks at 500 amps) so it powers fridges, compressors, and trolling motors without hitting a wall. Buyers report it running a travel trailer’s air conditioner for several hours without complaint, which is the sort of real-world stamina you want when you are off the grid for multiple days.
At 21.9 pounds, it measures 10.24 x 6.61 x 8.3 inches — fitting most standard Group 24 boxes. The Bluetooth 5.0 app, which lets you check voltage, state of charge (SOC), and temperature from your phone, has a usable range of over 50 feet. What wins people over is the battery quality, cited most often by a wide margin. The catch is that the app can act glitchy during charging, sometimes needing a reconnect, and a few owners mention the disconnect notifications are annoying. Still, a 5-year warranty backs it, and the 15000+ deep cycles means you will likely replace your boat before this battery wears out.
What the owners say: “1280Wh, 100% DOD, 100A BMS (1280W continuous, 500A peak).” The review pages sum it up: the battery is a killer upgrade for travel trailers and truck-bed power systems alike.
Reach for this if: you want a proven lithium drop-in with Bluetooth, strong BMS protection, and a decade-long lifespan that has been tested by hundreds of owners.
Look elsewhere if: you do not care about phone monitoring or you need a starting battery for your outboard — this is strictly an energy-storage (deep-cycle) battery.
2. SUPER EMPOWER 12V 100Ah LiFePO4 Lithium Battery, BCI Group 24
The entry ticket to lithium that does not cut corners on protection.
The SUPER EMPOWER 100Ah is the most affordable lithium pick here, and it manages to keep the features that actually matter. It delivers 5000 cycles at 100% depth of discharge (up to 15000 cycles at 60% DOD) and packs a 100A BMS with low-temperature cutoff that stops charging below 32°F and pauses discharge at -4°F. The battery weighs 21.6 pounds and measures 10.24 x 6.61 x 8.98 inches, a slightly taller profile than the Litime above by 0.68 inches.
Owner feedback highlights the battery performance heavily. One buyer ran a trolling motor for 5 hours on a heavy pontoon boat and saw no power loss, then recharged via solar easily. Another uses it as an auxiliary power source for a kayak motor and reports going very far per charge. The handles are folding, which makes lifting into a tight battery box much easier. The only things missing are Bluetooth monitoring and a percentage readout on the battery itself. If you do not need to check SOC from your phone, this is the most efficient way to spend your money on a 24 Group Marine Battery.
The Smart-Buy Case
- True drop-in replacement with M8 terminals and a Group 24 footprint
- Low-temp charging protection built into the BMS
- Owner-tested to power trolling motors for 5-hour sessions with zero sag
The Trade-Off
- No Bluetooth — you cannot check the charge level from your phone
- Initial charge can take overnight on a standard 20A charger
Best for: the budget-conscious angler or RV owner who wants a safe, long-lasting lithium upgrade and can live without a smartphone app.
skip it if: you rely on Bluetooth battery monitoring for confidence or need a display of the remaining capacity at a glance.
3. GrenerPower 12V 100Ah LiFePO4 Lithium Battery, Group 24
Mini form factor that still delivers full 100Ah punches.
The GrenerPower battery uses cylindrical Grade A+ cells rather than the more common prismatic design. This matters because cylindrical cells tend to have better thermal management and a lower risk of swelling over time. The 100A BMS includes 5-layer protection against overcharge, overdischarge, short circuit, overcurrent, and overheating — and the manufacturer specifically highlights that there is no thermal runaway risk, a strong safety claim.
At 22.6 pounds and dimensions of 10.23 x 6.61 x 8.3 inches, it sits right in the Group 24 balance. What owners rave about is the long runtime: one buyer ran a 40-year-old 3HP electric motor on a 10-foot dinghy for 20 minutes against a river current with no drop-off. Another upgraded from 133 pounds of lead-acid to three of these (around 20 pounds each) and gained 300Ah of usable capacity. The minor drawback is a lack of Bluetooth — and the initial batch of owners is still small. But the nearly perfect feedback so far is hard to ignore.
Bottom line: “Lasts a long time powering a 40+ year old 3hp electric motor on a 10’ dinghy. Tested for 20 minutes in river current against the wind with no drop off of power!” — that is the kind of real-world durability test that matters on the water.
Go for this if: you value thermal safety from cylindrical cells and want a battery that has absolutely satisfied every early owner who bought it.
Think twice if: Bluetooth monitoring is a must-have, or you want a track record beyond the first few months of use.
4. DC HOUSE 12V 100Ah LiFePO4 Trolling Motor Lithium Battery, Group 24
Full-time Bluetooth that watches each cell individually.
The DC HOUSE battery stands out for its granular Bluetooth monitoring — the app can read data down to the specific cell level and has a dedicated fault display page to help you troubleshoot. That is a level of transparency most batteries in this price range do not offer. It measures 10.2 x 6.6 x 9.2 inches (roughly 0.3 inches taller than the standard Group 24 spec, so measure your tray) and weighs 23.8 pounds.
Owners are quick to praise the runtime. One buyer trolled a heavy 16-foot aluminum boat against the wind for 4 straight hours and still had 60% left. Another mentions the Bluetooth connection has been flawless. The battery also features low-temp protection that cuts charging below 19.4°F and discharge below -4°F, with automatic recovery above 32°F. The only complaints involve a limited Bluetooth range (about 5-10 meters) and a few isolated customer service issues with other batteries from the same brand. For the price, this is a well-rounded package.
The Highlights
- Cell-level Bluetooth data and a fault-finding display in the app
- Proven trolling motor stamina — 4 hours on a heavy rig with 60% remaining
- Low-temp cutoff with automatic recovery
The Catch
- Bluetooth range is limited to roughly 5-10 meters from the battery
- 0.3 inches taller than standard Group 24 — verify your compartment height
Best suited to: anglers who want real-time cell-level data on their phone and need a battery that can survive a full day of trolling without dipping below half charge.
Consider alternatives if: your battery compartment is tight on vertical clearance or you require a longer Bluetooth range for remote monitoring.
5. HumsiENK 12V 100Ah LiFePO4 Lithium Battery with Bluetooth (Group 24)
Under 20 pounds with a tough IP65 seal against spray.
The HumsiENK battery hits the scale at just 19.73 pounds — that is lighter than some 50Ah SLA batteries. The weight savings come from A+ grade LiFePO4 cells that also carry an IP65 waterproof rating, meaning the battery can handle rain, deck spray, and a hose-down without issue. It measures 10.2 x 6.6 x 8.2 inches, making it one of the more compact options.
What owners appreciate most is the dedicated app, which offers 20-foot Bluetooth range and the ability to stop discharge remotely from your phone. One buyer ran a 55-pound thrust Newport trolling motor on a 12-foot jon boat for 6-hour trips and only used 20-30% of the battery. The built-in 100A smart BMS adds low-temperature protection. The occasional downside mentioned is a housing that feels a bit less sturdy than some competitors. Still, the 5-year warranty and strong customer service (one owner had a terminal issue resolved with a replacement shipped immediately) provide confidence.
Owner insight: “Great for trolling motor (Newport 55lb on 12ft jon boat). 6hr trips use 20-30%, 8hr max 50%. App works well.”
Grab this for: kayak, jon boat, or any setup where every pound saved affects performance, and you want a waterproof battery that can take spray.
Pass on it if: the feeling of the housing matters to you or you need a battery that can handle mechanical abuse inside an RV storage compartment.
6. Weize Dual Purpose AGM Battery BCI Group 24M
The AGM holdout that still starts big outboards and runs deep cycles.
Not every boat needs lithium. If your engine requires a starting battery and you still want some deep-cycle reserve for a fish finder and lights, the Weize Dual Purpose AGM is the right call. It delivers 550 cold cranking amps (CCA) and 150 reserve capacity (RC), enough to fire up an 8-cylinder Mercury 253 HP engine instantly, as one owner confirmed. It is a sealed AGM, so no water top-ups.
The trade-off for that starting power is weight. At 50.7 pounds, it is more than double the weight of any lithium pick here. It also follows the 50% depth-of-discharge rule, meaning you only get roughly 45Ah of usable capacity from its 90Ah rating before you risk shortening its life. The charging feedback is mixed — some say it charges quickly, while a smaller number report the battery did not last beyond a year. The 2-year warranty helps. If your setup runs a gas outboard and you are not ready for a full lithium rewire, this is a strong, affordable AGM option.
Why Choose This
- 550 cold cranking amps — genuine dual-purpose capability for starting and house loads
- Sealed, maintenance-free, and highly vibration-resistant
- Owners confirm it outperforms more expensive Interstate AGM batteries in real use
The AGM Reality
- 50.7 pounds is heavy — lifting it into a battery tray is a two-hand job
- Only 90Ah total with roughly 45Ah usable (50% DOD rule)
- Charging compatibility and lifespan get mixed owner feedback
Choose this if: you need a single battery to both crank an outboard and run a modest trolling motor or electronics, and you prefer the lower upfront cost of AGM.
Stick with lithium if: you are running a dedicated trolling motor setup, you want 100% usable capacity, or you cannot handle the weight.
7. Power Queen 12V 100Ah LiFePO4 Battery, Group 24
A three-year track record that speaks for itself.
Power Queen has been in the lithium marine battery game longer than many of the newer names on this list. This Group 24 model offers 21 pounds of weight, 100% usable 1280Wh of energy, and 15000+ deep cycles. The EV-grade LiFePO4 cells are backed by a 20+ protection BMS that handles overcharge, overdischarge, and overheating. Buyers consistently praise the battery life — the aspect mentioned most often by a wide margin — and the build quality.
One owner reported their first Power Queen battery lasted over 3 years on a trolling motor before a BMS issue appeared. The warranty team shipped a replacement immediately, which is the kind of support you want for a battery you rely on. Another owner uses them as a field battery for HAM radio and loves the integrated carry handles. The only real knock is the lack of Bluetooth monitoring in this specific model. If that does not bother you, this is one of the safest bets for long-term use.
Owner confidence: “First lasted 3+ years on trolling motor. BMS issue on new one; warranty honored, replacement shipped quickly.”
Pick this one if: a proven track record of 3+ years of real trolling motor use matters more than having Bluetooth, and you value a company that stands behind its warranty.
Go elsewhere if: you want to monitor the battery from your phone or you prefer cylindrical cell construction over prismatic.
8. Redodo 12V 100Ah LiFePO4 Battery Bluetooth, Group 24
Built to shrug off the salt-spray life of a bay boat.
Saltwater and electronics do not mix, but the Redodo battery is built with waterproof, salt-spray, and corrosion protection specifically for marine environments. The BMS is upgraded for trolling motor use, ensuring the high current draw of a 55-pound or 80-pound thrust motor does not trip the system mid-fight. It weighs 22.2 pounds and measures 10.24 x 6.61 x 8.27 inches, a standard Group 24 footprint.
The Bluetooth 5.0 app reads voltage, current, power, and capacity in real time, with a range of about 10 meters. Owners are impressed: after a fishing weekend, the app showed 80% charge remaining. One buyer tested two units and the app showed 102Ah capacity each, slightly above the rated spec. The only note is that it may not work with older Noco lithium chargers (Gen 5 works, older G7200 v2 fails). The 5-year warranty and 10-year service life make the higher cost easier to justify if you are in a harsh marine environment.
Owners mention: “After fishing weekend, app showed 80% charge. Much lighter than lead-acid. High cost justified by weight, app, capacity, and longer lifespan vs. lead replacement every 2 years.”
Reach for this if: your boat lives in saltwater, you need a trolling motor battery with corrosion protection, and you want the confidence of a 5-year warranty and 4000 deep cycles.
Pass if: you use an older Noco charger without lithium compatibility, or you are on a strict budget.
9. LiTime 12V 100Ah Group 24 LiFePO4 Battery, Bluetooth
The Bluetooth battery that proves the monitoring hype is real.
This is the second LiTime entry on the list, and it deserves its own spot because of the battery-life consensus among owners — battery life is the most-mentioned aspect here by a significant count. The 12V 100Ah Group 24 battery weighs 21.9 pounds, provides 1280Wh of usable energy, and is certified to CE and RoHS standards. The Bluetooth monitoring app is described by owners as flawless, making it easy to check state of charge without crawling under a seat.
One owner powered a 60-inch TV and Yamaha stereo for over 5 hours with energy left over. Another uses it as a sump pump backup battery and says it eased their nerves about a high water table. The 100A BMS includes low-temperature cutoff, stopping charge below 32°F and discharge below -4°F. The 5-year warranty and AIG product liability insurance provide an extra layer of security. The only minor note: like the other LiTime model, the app can occasionally need a reconnect during charging cycles. On balance, this is the best-supported lithium battery for buyers who want to read battery health data on their phone without glitches.
Why It Stands Out
- Owners flatly say the Bluetooth monitoring app works flawlessly and the battery holds charge all winter
- At 21.9 lbs, it fits Group 24, 27, or 31 boxes for universal installation
- 15000 deep cycles at partial DOD backed by a 5-year warranty
The Small Downside
- App can lose connection during aggressive charging and need a phone-side reconnect
- Energy storage only — cannot be used as an engine-starting battery
Best for: owners who will use the Bluetooth app daily to monitor their power system and want the most owner-verified battery life data available for a Group 24 pack.
Not for you if: you need a starting battery or you prefer a battery without any app connectivity quirks.
Understanding the Specs
BMS (Battery Management System)
The BMS is the internal computer that keeps the lithium cells balanced and safe. It prevents overcharging, over-discharging, and overheating. For a trolling motor, look for a 100A BMS so the system does not shut down when you punch the throttle. A lower rating can cut power mid-trip.
Low-Temperature Cutoff
Lithium batteries cannot be charged below 32°F (0°C) without damage. A low-temp cutoff automatically stops charging when the cells are too cold and resumes once they warm up. If you fish in early spring, store your boat in an unheated garage, or go ice fishing, do not buy a battery without this feature.
FAQ
Can I use a 24 group marine battery to start my outboard motor?
How long does a 100Ah lithium battery run a trolling motor?
Will a Group 24 lithium battery fit my existing battery tray?
What charger do I need for a LiFePO4 marine battery?
Can I connect multiple 24 group batteries in parallel?
Is Bluetooth battery monitoring worth the extra cost?
How does lithium compare to AGM for a marine battery?
What does low-temperature protection do on a lithium marine battery?
How many watt-hours is a typical 24 group 100Ah battery?
Can I use a lithium battery as a direct replacement for my old Group 24 lead-acid battery?
Final Thoughts: The Verdict
Across the board, the 24 group marine battery winner is the Litime 12V 100Ah Bluetooth because it combines proven battery quality (the most-cited positive across hundreds of owners), a 100A BMS, Bluetooth 5.0 monitoring, and a 5-year warranty at a competitive price. If you want the best raw bang-for-your-buck without the phone app, grab the SUPER EMPOWER 100Ah. And for a saltwater-protected trolling motor battery with cell-level Bluetooth data, the Redodo 100Ah is the one to reach for.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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