6 Best Lightweight Trolling Motor Batteries in 2025

When you're out on the water, every pound counts. Whether you're kayak fishing, cruising a small boat, or navigating tight spots, choosing the lightest and smallest trolling motor battery can significantly improve your experience. This guide features the 6 best lightweight trolling motor batteries in 2025, ideal for anglers and boaters who want power without the weight.

Why Lightweight Matters in Trolling Motor Batteries

Trolling motors are often used in setups where space and weight are limited, like kayaks, jon boats, or small fishing boats. Traditional lead-acid batteries are bulky and heavy, often weighing 60 lbs or more. Lithium iron phosphate (LiFePO4) batteries, likes Redodo batteries, offer a lighter, longer-lasting, and more efficient alternative—often at 1/3 the weight and size, with three times of the lifespan.

Benefits of Lithium Batteries for Trolling Motors

• Lightweight: Up to 60% lighter than lead-acid batteries, making them perfect small boats and lightweight kayak batteries.
• Longer Lifespan: Lithium batteries can last over 10 years with up to 4000+ charge cycles.
• Consistent Power: They deliver stable voltage throughout the entire discharge cycle, ensuring your trolling motor runs strong until the very end.
• Faster Charging: Charge faster, letting you get back on the water sooner.
• Maintenance-Free: No water refilling or acid spills—just plug and play.

Read More: Deep Cycle LiFePO4 vs. Lead Acid Battery

1. Redodo 12V 50Ah Lithium Deep Cycle Battery 

• Weight: 11.66 lbs
• Size: 7.68 x 6.54 x 6.77 inches
• Max Continuous Discharge: 50A
• Surge Discharge Current: 150A
• Usable Capacity: 640Wh
• Charging Time: 5 hours with a 10A charger
• Cycle Life: 4000+ cycle in 100% DOD, with 10+ years lifespan
• Expandable: Up to 4 in series or 4 in parallel (max 10.24kWh)
• Bluetooth Monitoring: Redodo 12V 50Ah Smart Bluetooth model available

Perfect for ultralight setups like inflatables or kayaks, this 12V 50Ah battery is a great pick, if you're looking for the smallest battery for trolling motor that still delivers consistent and clean energy.

Compared to a 12V 50Ah AGM battery, the battery is 60% lighter—weighs only 11 lbs, making them convenient and portable option for small boats, even hiking and camping. It’s ideal for occasional boating trips or short, half-day adventures on the water.

2. Redodo 12V 100Ah Mini LiFePO4 Lithium Battery

• Weight: 19.84 lbs
• Size: 10.24 x 5.24 x 8.96 inches
• Max Continuous Discharge: 100A
• Surge Discharge Current: 400A
• Usable Capacity: 1280Wh
• Charging Time: 5 hours with a 20A charger
• Cycle Life: 4000+ cycle in 100% DOD, with 10+ years lifespan
• Expandable: Up to 4 in series or 4 in parallel (max 20.48kWh)
• Bluetooth Monitoring: Redodo 12V 100Ah Mini Bluetooth model available

This Mini version small LiFePO4 battery packs a punch in a reduced size—20% smaller than the standard 100Ah lithium battery, yet still delivers the same 1280Wh capacity. It's ideal for anglers who need longer runtime but have limited space. The smart Bluetooth version allows you to monitor performance, temperature, and cycle life right from your phone. 

3. Redodo 12V 100Ah LiFePO4 Trolling Motor Battery

• Weight: 22.15 lbs
• Size: 13 x 6.77 x 8.43 inches (Group 31 dimensions)
• Max Continuous Discharge: 100A
• Surge Discharge Current: 500A in 1 second
• Usable Capacity: 1280Wh
• Extended function: Low-temperature protection
• Charging Time: 5 hours with a 20A charger
• Cycle Life: 4000+ cycle in 100% DOD, with 10+ years lifespan
• Expandable: Up to 4 in series or 4 in parallel (max 20.48kWh)

The 12V lithium trolling motor battery is Redodo's most popular battery model for 12V trolling motors. Weighing nearly 60% less than lead-acid, it offers a full 1280Wh of usable energy and delivers a flat voltage curve to keep your motor performing at peak power until the very end. The built-in BMS provides protection against overcharging, over-discharging, overcurrent, short circuits, and temperature extremes.

The additional features including pre-charge function, automatic recovery after protection, enhanced moisture-proof, and salt-spray anti-levels for marine. It’s IP65 water-resistant and ideal for both freshwater and saltwater environments.

4. Redodo 12V 140Ah Lithium Dual Purpose Marine Battery

• Weight: 36.5 lbs
• Size: 13 x 6.77 x 8.5 inches (Group 31 size)
• Cold Cranking Amps: 1000A (-10℃@1s)
• Max Continuous Discharge: 140A
• Usable Capacity: 1792Wh
• Charging Time: 2.3 hours with a 60A charger
• Expandable: For starting and deep cycle: 4P1S; For only energy storage: 4P4S
• Bluetooth Monitoring: Yes

This dual-purpose Group 31 marine battery is designed to start your outboard engine and run your trolling motor with ease. Whether you fish offshore or in rough water conditions, this battery offers both reliability and flexibility.

The high current tolerance makes it suitable for sudden load demands, and the high-performance LiFePO4 cells ensure it won't suffer from voltage drops like traditional lead-acid batteries. It’s ideal for bass boats that need a 2-in-1 solution. The smart Bluetooth monitoring gives you full control and peace of mind on the water, while the IP67 rating provides higher-grade protection against dust and water.

5. Redodo 12V 100Ah Group 24 Bluetooth Lithium Battery

• Weight: 21.8 lbs
• Size: 10.24 x 6.61 x 8.3 inches (Group 24 dimensions)
• Max Continuous Discharge: 100A
• Surge Discharge Current: 500A in 1 second
• Usable Capacity: 1280Wh
• Charging Time: 5 hours with a 20A charger
• Cycle Life: 4000+ cycle in 100% DOD, with 10+ years lifespan
• Expandable: Up to 4 in series or 4 in parallel (max 20.48kWh)
• Bluetooth Monitoring: Yes

This battery is great for boaters upgrading from lead-acid to lithium but keeping the same Group 24 battery tray. It's a drop-in replacement with advanced Bluetooth functionality that shows real-time state of charge, cycles, and temperature. Weighs only 21.8 lbs, the Group 24 size battery is 60% lighter than lead-acid. Great for medium-sized boats and kayaks with onboard compartments that require standard sizing.

6. Redodo 12V 100Ah Group 31 Bluetooth Lithium Battery

• Weight: 22.84 lbs
• Size: 13 x 6.77 x 8.5 inches (Group 31 dimensions)
• Max Continuous Discharge: 100A
• Surge Discharge Current: 500A in 1 second
• Usable Capacity: 1280Wh
• Charging Time: 5 hours with a 20A charger
• Cycle Life: 4000+ cycle in 100% DOD, with 10+ years lifespan
• Expandable: Up to 4 in series or 4 in parallel (max 20.48kWh)
• Bluetooth Monitoring: Yes

Need the Group 31 form factor but don’t want the 60–70lb weight of an AGM? The Redodo 12V 100Ah Group 31 battery offers 1280Wh of capacity, weighs just 22.84 lbs, and comes with Bluetooth 5.0 for easy remote monitoring. It's also IP65 rated and features upgraded BMS with over 20 safety functions, making it one of the most reliable and lightest trolling motor battery options in its class.

Conclusion

When choose a lightweight trolling motor battery, upgrading to lithium is a smart move if you're looking to reduce weight and increase performance. The article lists top lightweight options for your trolling motors. Whether you're in a kayak, canoe, or full-size boat, Redodo offers a wide range of high-quality lithium batteries for trolling motors that are lighter, smarter, and longer-lasting.

Explore more options? Check out our full collection of lithium trolling motor batteries. Subscribe to our newsletter for exclusive tips, product updates, and special discounts. Let Redodo power your next adventure!

Read More:

Group 24 vs. Group 31 Battery

Best Battery for Kayak Trolling Motor

How Fast Will a Kayak Go With a Trolling Motor?

How Long Will a 100Ah Battery Run a 55lb Trolling Motor?