The trolling motor battery decision has changed. Not long ago the choice was between a flooded deep-cycle and an AGM, and the question was how many pounds of lead you were willing to lift into the bow. Today six of the seven options here are lithium iron phosphate, often shortened to LiFePO4, and the real question is whether the extra up-front cost and the need for a compatible charger pay off on your water. For anglers who fish all day, the answer is increasingly yes, because a lithium battery holds steady voltage until it is nearly empty.
This guide is for people shopping for the house battery that runs the electric motor on a bass boat, jon boat, kayak, or small fishing rig. It covers one traditional AGM and six 12V lithium batteries for 2026, compared only on the facts stated in their listings: capacity, battery management system rating, group size, cycle counts, and extras like Bluetooth monitoring and low-temperature protection. Exact weights and dimensions are not in those titles, so verify them before you buy, especially if you lift the battery in and out of a small boat by hand or have a weight-sensitive kayak.
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| Product | Best for | Key spec from the title |
|---|---|---|
| Group 24 100Ah LiFePO4 | Boats with Group 24 battery trays | 12V 100Ah, Group 24, 1280Wh, 100A BMS, 4P4S expansion |
| Newport 50Ah AGM | Kayaks and light-duty trips | 12V 50Ah deep cycle AGM, sealed lead acid |
| CHITOLI 100Ah TM | Multi-use, from boat to home backup | 100A BMS, 4000 to 15000 cycles, 10-year lifetime |
| Litime 100Ah with Bluetooth | Monitoring charge from your phone | Bluetooth, Group 31, IP65, low-temp protection |
| Litime 100Ah 100A BMS | Boat and RV dual use | Group 31, 100A BMS, 15000 cycles, IP65 |
| GOKWH 100Ah Bluetooth | App-based monitoring on a tight budget tier | Bluetooth APP, 1280Wh, 100A BMS, 4000+ cycles |
| BUKNUWO 100Ah Bluetooth | Marine plus off-grid solar | Bluetooth, 15000+ cycles, 12.8V |
How to Choose
Lithium or AGM
A 50Ah AGM gives you about 25Ah of healthy usable capacity if you follow the half-discharge rule for lead-acid. A 100Ah LiFePO4 battery can typically be drawn much closer to empty, which means its usable energy can be three to four times as much while the case is often far lighter. The cost is a higher purchase figure and a charger that supports lithium profiles. If you fish only a couple of hours at a time on a small lake, AGM can still make sense.
Capacity and runtime
Multiply amp-hours by 12.8 volts to get watt-hours: 100Ah equals the 1280Wh figure shown in several titles. Divide by your motor’s average draw. A 12V motor running at a moderate setting might average 20 to 30 amps, so a 100Ah battery can run several hours, while the same motor at full thrust drains it much faster. Check your motor’s maximum amp rating and make sure it sits comfortably under the battery’s 100A BMS limit.
Group size, protection, and monitoring
Group 24 cases are shorter than Group 31, so match the tray first. Low-temperature cutoff, mentioned on several listings, stops charging when the cells are cold, which protects lithium chemistry during early-spring and late-fall trips. IP65 on the Litime units points to dust-tight, splash-resistant cases for open boats. Bluetooth lets you check state of charge without opening the battery box, which is useful when you need to decide whether to head back to the ramp.
What to ignore and where budgets cut corners
Ignore the biggest cycle-count figure, since 15000 cycles is a lab-style maximum under ideal conditions and you will rarely use more than a few hundred per year. Budget lithium packs cut corners on customer support, case sealing, and verification of rated discharge current. Prefer listings that state the BMS amp limit and expansion options, and make sure your charger supports the chemistry.
The 7 Best Options
Group 24 100Ah LiFePO4
A 12V 100Ah LiFePO4 battery in Group 24, aimed at RVs and trolling motors, with 1280Wh of capacity, a 100A BMS, low-temperature cutoff, and a note that it supports 4P4S expansion. The expansion support means you can combine units for 24V or 36V motor systems, within the manufacturer’s limits.
- Group 24 case fits trays too small for Group 31.
- Expansion support leaves room for a higher-voltage system later.
- Trade-off: the title does not list Bluetooth monitoring.
Because it also names RV use, it suits an angler who borrows the same battery for a camper on weekends. Skip it if your battery tray is built for Group 31 or you want app-based monitoring.
Newport 50Ah AGM
A 12V 50Ah deep-cycle AGM described as a rechargeable sealed lead acid battery for trolling motors, kayaks, and small boats. It is the traditional pick for light-duty use and works with any standard lead-acid charger, which avoids the need for a new charging setup.
- Sealed AGM design means no watering or acid spills.
- Works with a conventional charger.
- Trade-off: 50Ah gives the smallest usable runtime in the lineup.
Kayak anglers who portage their gear will appreciate the small-boat positioning, and the lower entry point makes it a low-risk first battery. Skip it if you fish all day or run a motor with high amp draw.
CHITOLI 100Ah TM
A 12V 100Ah LiFePO4 labeled for trolling motor use, with a built-in 100A BMS, 4000 to 15000 deep cycles, and a 10-year lifetime claim, suited for RVs, camping, solar, and home use as well. It is a versatile battery for anglers who want one unit that also supports camping or backup power.
- Wide use list covers marine, camping, solar, and home.
- Long stated lifetime and cycle range.
- Trade-off: the title does not state a Group size or Bluetooth monitoring.
The “TM” in its name signals a trolling-motor design focus, which is reassuring when you plan to run it at steady, moderate draw for hours. Skip it if you need a specific Group size or app features.
Litime 100Ah with Bluetooth
A 12V 100Ah trolling motor LiFePO4 for marine, boat, and yacht use, with Bluetooth, Group 31, a maximum of 15000 cycles, low-temperature protection, and an IP65 waterproof rating. The Bluetooth feature separates it from its sibling and suits anglers who like checking battery status from the phone.
- Bluetooth monitoring for checking state of charge.
- IP65 protection suits open boats.
- Trade-off: Group 31 needs a roomier tray than Group 24.
Tournament-style anglers who manage every minute on the water get the most from a live state-of-charge readout, since it avoids guessing how much runtime is left. Skip it if your battery box is small or you do not care about app monitoring.
Litime 100Ah 100A BMS
A 12V 100Ah trolling motor LiFePO4 for marine, boat, RV, and yacht use, in Group 31 with a 100A BMS, up to 15000 cycles, low-temperature protection, and IP65 waterproofing. It trades the Bluetooth feature for a title that highlights the BMS rating and RV use.
- Stated 100A BMS helps you match motor draw.
- RV listing supports dual use at the campsite.
- Trade-off: no Bluetooth is mentioned in the title.
Buyers who prefer a straightforward battery that goes in the box and stays there, without another app to manage, will find this version appealing. Skip it if you want phone-based monitoring.
GOKWH 100Ah Bluetooth
A 12V 100Ah LiFePO4 marine battery with a Bluetooth APP, 1280Wh of capacity, a built-in 100A BMS, and 4000+ deep cycles, described as a trolling motor battery for boats and RVs. Its stated cycle count is lower than the 15000 figures elsewhere, which is still a long life for most fishing schedules.
- Bluetooth app monitoring included.
- 1280Wh capacity and a 100A BMS match the other 100Ah units.
- Trade-off: the 4000+ cycles figure is the lowest stated for a lithium option here.
Anglers who fish a few dozen days a year will never approach even that lower cycle figure, so the difference is more about marketing than real-world lifespan. Skip it if you want the highest advertised cycle count.
BUKNUWO 100Ah Bluetooth
A 12V 100Ah LiFePO4 battery with Bluetooth, 15000+ cycles, and a listing that covers trolling motors, off-grid power, boats, RVs, marine, and solar, with 12.8V nominal voltage. It is the broadest-use option for people who want one battery for a boat and a solar setup.
- Bluetooth and a high stated cycle count.
- Broad application list from boat to solar.
- Trade-off: the title does not state group size or a low-temperature feature.
Cabin owners and van campers who add a small solar charger will like the off-grid mention, because the battery can keep a boat and a basecamp running on one chemistry. Skip it if cold-weather protection is a priority.
Which One Fits Your Situation
You fish all day from a bass boat
The Litime 100Ah with Bluetooth gives Group 31 capacity, IP65 protection, and a phone readout so you can decide when to head in. Its twin without Bluetooth is the alternative when you would rather skip the app.
Your tray is smaller or you plan a 24V upgrade
The Group 24 100Ah LiFePO4 fits shorter trays and mentions 4P4S expansion for combining units.
You fish a small lake or paddle a kayak
The Newport 50Ah AGM covers modest sessions and uses a standard lead-acid charger. It is the lowest-commitment way to get started, and it can later move to a secondary role if you upgrade to lithium.
You want one battery for boat, camp, and solar
The CHITOLI 100Ah TM or BUKNUWO 100Ah list multiple uses. Choose the GOKWH 100Ah if you want Bluetooth with a more modest cycle claim.
Common Mistakes
- Using a lead-acid charger on a lithium battery, which can undercharge it or trigger protection.
- Ignoring the motor’s maximum amp draw and overloading the BMS limit.
- Buying Group 31 without measuring the tray first.
- Counting on advertised cycle numbers as a guarantee of how long the battery will last in real use.
- Charging a lithium battery below freezing without checking its low-temperature behavior.
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Frequently Asked Questions
Is a 100Ah battery enough for a trolling motor?
For many 12V motors it covers several hours at moderate speeds. Heavy use at full thrust shortens that, so check the motor’s maximum draw and your typical trip length.
Do I need a special charger for LiFePO4?
Yes, a charger with a lithium profile is recommended. Many lead-acid chargers use a different voltage curve and may not fully charge a lithium battery, and some include a desulfation mode that is wrong for lithium cells. Check the charger’s manual before connecting it.
What does 4P4S mean?
It describes the maximum arrangement of up to four batteries in parallel and four in series. That lets you build higher-voltage or higher-capacity banks within the maker’s limits.
Why was one popular Group 31 listing left out?
Its title is cut off before any mention of trolling motors, so it could not be confirmed as a fit. Only listings that clearly state trolling motor use are included.
