Powering your trolling motor requires a battery that is both robust and reliable. A 12V 100Ah lithium iron phosphate (LiFePO4) battery offers a significant upgrade over traditional lead-acid, providing more usable power, a dramatically longer lifespan, and a fraction of the weight. Choosing the right one can be the difference between a full day on the water and an unexpected trip back to the dock.
This guide examines eight of the top 12V 100Ah lithium batteries designed for marine use. We focus on key features for anglers, including battery management system (BMS) protections, cycle life, low-temperature performance, and connectivity options. Our goal is to help you find the perfect power source to keep your trolling motor running strong throughout your fishing adventures.
Our Top Picks for 12V 100Ah Trolling Motor Batteries
- FLLYROWER 12V Lithium Battery 100AH With BMS
- 12V 100Ah lithium battery with Bluetooth for trolling motor
- SIEKON 12V 100Ah Trolling Motor LiFePO4 Lithium Battery
- Litime 12V 100Ah Trolling Motors LiFePO4 Battery (Group 31)
- 12V 100Ah Group 24 Lithium Deep Cycle Battery
- Dakota Lithium 12V 100Ah LiFePO4 Deep Cycle Battery
- Ampere Time 12V 100Ah LiFePO4 Lithium Battery
- Chins 12V 100Ah LiFePO4 Lithium Iron Phosphate Battery
FLLYROWER 12V Lithium Battery 100AH With BMS
The FLLYROWER battery is built for longevity, featuring Grade A cells rated for an impressive 16,500 deep cycles. This means you can use nearly the full capacity of the battery regularly without worrying about damaging it, a clear advantage over lead-acid types. Its comprehensive BMS provides multiple layers of safety, including crucial low-temperature protection that automatically cuts off power in cold conditions to preserve battery health.
For anglers planning to expand their power system, this battery offers excellent flexibility. It supports connections of up to five in series for higher voltage systems (like 24V or 36V for larger trolling motors) and has no limit on parallel connections for increased capacity. This makes it a strong candidate not just for your boat, but also for RV, solar, and other off-grid applications where scalable power is needed.
12V 100Ah lithium battery with Bluetooth for trolling motor
Stay informed about your power supply with this FIUNIE battery’s built-in Bluetooth module. By connecting to your smartphone, you can check the battery’s status in real-time, allowing you to monitor charge levels and plan your fishing time effectively. The battery is constructed with advanced A-grade LiFePO4 cells, promising a service life of up to 10 years and 8,000 cycles, making it a durable, long-term investment.
An upgraded 100A BMS ensures strong and stable performance by guarding against overcharge, over-discharge, and short circuits. It also includes low-temperature shutdown protection, which is vital for early morning or late-season fishing trips. Weighing just 24.25 pounds and featuring a compact design, this battery saves significant space and weight compared to traditional options, and it is compatible with trolling motors under 70 lbs of thrust.
SIEKON 12V 100Ah Trolling Motor LiFePO4 Lithium Battery
SIEKON brings its extensive experience from the electric vehicle industry to the marine battery market. This background suggests a focus on quality control and reliable performance. The battery is designed to the standard BCI Group 24 size, making it a direct replacement for many existing battery boxes, and it weighs a remarkably light 21 pounds, which is 66% lighter than a comparable lead-acid battery.
Beyond the standard BMS protections, this battery includes specific features for harsh marine environments. A built-in transient voltage suppressor (TVS) guards against sudden voltage and current shocks, which can occur during charging or from other equipment on the boat. Furthermore, its IP67-rated watertight protection ensures the battery can withstand rain and splashes, giving you peace of mind in wet conditions.
Litime 12V 100Ah Trolling Motors LiFePO4 Battery (Group 31)
Litime offers smart connectivity with its Bluetooth-enabled Group 31 battery. The app allows for auto-connection and provides a clear view of your battery’s status, letting you control discharge settings and run system diagnostics directly from your phone. This level of control is convenient for managing your power usage throughout the fishing day and for troubleshooting any potential issues.
Built to handle demanding environments, this battery features smart low-temperature protection that prevents charging below 32°F to avoid damage. It is also engineered with over 20 safety protections, including defenses against overcharge and overheating. The housing is dustproof, IP65 waterproof, and salt-resistant, making it a rugged and reliable choice for the challenging conditions found on boats and in marine applications.
12V 100Ah Group 24 Lithium Deep Cycle Battery
This Group 24 battery is designed with a wide operating temperature range, functioning from -4°F to 140°F. Its high-temperature cutoff prevents charging above 167°F, offering an extra layer of safety in hot climates or during fast charging. Paired with an upgraded 100A BMS and Grade A cells, it provides a secure and stable power source for your trolling motor and other onboard electronics.
For those with larger power requirements, this model supports significant capacity expansion. You can connect up to 16 of these batteries to create a system with a maximum of 20.48kWh, suitable for large boats with multiple power demands or for extensive off-grid setups. This scalability makes it a future-proof option if your power needs grow over time.
Dakota Lithium 12V 100Ah LiFePO4 Deep Cycle Battery
Dakota Lithium has established a strong reputation in the outdoor and marine communities for producing durable and high-performance batteries. Known for their robust construction and reliable power delivery, these batteries are a popular choice among serious anglers who demand consistency and longevity from their equipment. The brand is often associated with a strong warranty and customer support.
While specific features for this model should be verified on the product page, Dakota Lithium batteries typically include a sophisticated BMS with standard protections and are built to withstand the rigors of frequent use. Their focus on the marine and RV markets means their products are tested for the vibrations and environmental challenges presented by life on the water.
Ampere Time 12V 100Ah LiFePO4 Lithium Battery
Ampere Time is a well-known name in the value-focused segment of the lithium battery market. Their 12V 100Ah model is frequently recognized for providing a solid balance of performance, features, and affordability. It serves as a reliable power source for trolling motors and is also widely used in solar and RV applications.
These batteries generally come equipped with a capable BMS that offers essential protections like over-current, short-circuit, and temperature cutoffs. For boaters looking to make the switch from lead-acid to lithium without a substantial investment, the Ampere Time battery presents a compelling option that delivers the core benefits of LiFePO4 technology.
Chins 12V 100Ah LiFePO4 Lithium Iron Phosphate Battery
Chins offers another popular option for consumers seeking reliable lithium power. Their 12V 100Ah battery is designed to be a direct drop-in replacement for many existing systems, featuring a standard case size that fits common battery trays. It is known for its user-friendly design and straightforward installation process.
Equipped with a built-in BMS, the Chins battery protects against common issues like overcharging and deep discharge. It provides a long cycle life and maintains a stable power output, which is essential for the consistent performance of a trolling motor throughout a long day of fishing. It represents a practical choice for everyday use on the water.
What to Look For in the Best 8V 100Ah Lithium Batteries for Trolling Motors
When I’m looking to power my trolling motor, I know that not all batteries are created equal. An 8V 100Ah lithium battery is a specific beast, often used in a series of four to create a 32V system for some serious thrust. The first thing I always check is the battery management system, or BMS. A high-quality BMS is the brain of the battery; it protects against overcharging, over-discharging, short circuits, and temperature extremes. This isn’t just a nice-to-have feature—it’s essential for safety and the long-term health of my investment.
Next, I consider the physical build. Since I’m on a boat, things can get wet and bumpy. A battery with a robust, waterproof casing (look for at least an IP67 rating) gives me peace of mind against splashes and the occasional downpour. The weight is another huge factor. One of the main reasons I switched to lithium is the dramatic weight savings over lead-acid. A typical 8V 100Ah lithium battery is significantly lighter, which makes loading and unloading the boat much easier and helps with overall boat performance and fuel efficiency.
I also pay close attention to the manufacturer’s reputation and the warranty. A company that stands behind its product with a solid, multi-year warranty is a company that trusts its own build quality. I look for warranties that cover a certain number of charge cycles or a period of years. Finally, I think about the practical stuff: are the terminals easy to access and corrosion-resistant? Does it have a clear state-of-charge indicator? These small details make a big difference on the water. Choosing the right 8V 100Ah lithium battery means I can focus on fishing, not on whether my power will hold up.
FAQ
Why would I choose an 8V battery instead of a 12V for my trolling motor?
It all depends on your motor’s voltage requirements. Many high-thrust trolling motors, especially those on larger boats, are designed for 24V, 36V, or even 48V systems. You can’t get a 36V system with 12V batteries alone. By using 8V batteries, you can wire three of them in series for a perfect 24V system or four for a 32V system that works great with 36V motors. It gives you more flexibility to match your motor’s specific needs precisely.
How long will an 8V 100Ah lithium battery last on a single charge?
This is the “it depends” question, but I can give you a good estimate. It primarily depends on the power setting of your trolling motor. If you’re running it at a lower speed, you might get a full day or even multiple days of use. At maximum thrust, it will drain much faster. As a rough guide, a 100Ah battery can theoretically supply 100 amps for one hour. Since most trolling motors draw between 10-50 amps depending on speed, you can do the math. At a 25-amp draw, you’re looking at around 4 hours of continuous runtime.
Can I use a single 8V 100Ah battery for my trolling motor?
Almost certainly not. Most trolling motors require a minimum of 12V to even start. A single 8V battery doesn’t provide enough voltage. These batteries are designed to be used in series. You would typically connect three 8V batteries for a 24V system or four for a 32V system to power a compatible 36V motor. Always, always check your trolling motor’s manual for its specific voltage requirements before buying any batteries.
Are lithium batteries really worth the higher cost compared to lead-acid?
From my experience, absolutely. While the initial price is higher, lithium batteries last much longer, often providing over 2000 charge cycles compared to 300-500 for a good lead-acid. They are also significantly lighter, maintain a consistent voltage (so your motor doesn’t lose power as the battery drains), and can be discharged much more deeply without causing damage. You also don’t have to worry about maintenance like adding water. Over the life of the battery, the value is definitely there.
What’s the best way to maintain my 8V 100Ah lithium battery?
The good news is that maintenance is minimal. The most important thing is to use a charger designed for lithium-iron-phosphate (LiFePO4) chemistry. Avoid letting the battery sit completely discharged for long periods; if you’re storing it for the off-season, a 50% charge is ideal. Keep it in a cool, dry place. Beyond that, just make sure the terminals are clean and tight. The battery management system handles most of the hard work for you. For anyone searching for the best 8V 100Ah lithium batteries for trolling motors, understanding this low maintenance is a key benefit.