What size battery do I need for my trolling motor?

Q: What size battery do I need for my trolling motor?

Match the voltage first, then pick capacity for your day. A 12-volt motor runs on one 12-volt battery; for 24 or 36 volts you wire two or three 12-volt batteries in series, or use one 24- or 36-volt lithium battery. Minn Kota recommends a deep-cycle marine battery of at least 105 amp-hours for its 12-volt Endura C2, and Redodo recommends its 12V 100Ah lithium for 30 to 70 lb thrust motors.

Updated October 25, 2026. Every answer lists the sources we read it from. If we couldn't back an answer, we left the question out.

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Connecting batteries in series raises the voltage; connecting them in parallel raises the capacity (Victron, Wiring Unlimited).

Redodo says its 12V 100Ah gives the same usable energy as a 200Ah lead-acid battery, because it is rated for full discharge while Renogy advises not taking its AGM below 50%. Use the runtime calculator to check a battery against your motor and speed.

Redodo 12V 100Ah (opens in a new tab)For 30 to 70 lb thrust motors (Redodo); $269.99 on October 25, 2026

Run your own numbers: Trolling motor battery picks · 24V vs 36V trolling motors

Sources

All 5 questions on electric boating · Every question we answer

Best trolling motor batteriesLithium picks for 12, 24 and 36 V.

Estimates only. Your actual costs depend on your utility's rate plan, how and when you charge or use power, and local prices. This is general information, not financial, tax or legal advice. See our disclaimer.

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