When it comes to powering your trolling motor, nothing beats the endurance and performance of a Group 31 deep cycle battery. These batteries are specifically designed to handle the high demands of marine propulsion systems.
What Makes a Battery Ideal for Trolling Motors?
-
High Amp-Hour Rating: More Ah = longer trolling time
-
Vibration Resistance: Essential for marine conditions
-
Fast Recharge: Keeps downtime minimal
-
Low Internal Resistance: Supports steady discharge
Best Group 31 Batteries for Trolling Motors
1. Dakota Lithium 100Ah LiFePO4
-
Up to 5,000 cycles
-
Weighs only 31 lbs
-
11-year warranty
2. VMAX MR137-120 AGM
-
120Ah true deep cycle
-
No maintenance
-
Built for marine use
3. Renogy 100Ah Hybrid Gel Battery
-
Great balance of price and performance
-
Can be mounted in any direction
-
1-year warranty
Runtime Estimations
For a 100Ah Group 31 battery:
-
30lb thrust motor at 50% speed: ~6–8 hours
-
55lb thrust motor: ~4–6 hours
Multiple batteries in parallel can double or triple runtime.
FAQ
Can I use two Group 31 batteries together?
Yes. Wiring in parallel doubles capacity. Series wiring increases voltage.
Is lithium better for trolling motors?
Yes. Lithium offers more cycles, faster charging, and less weight.
How long does it take to recharge a Group 31 battery?
Typically 4–10 hours depending on charger amperage and battery chemistry.
Conclusion
For long-lasting trolling power, a Group 31 deep cycle battery is an excellent investment. Lithium, AGM, and Gel options are available to match your budget and needs, offering the best balance of performance and longevity for marine use.