On the water a battery's weight, runtime and reliability are felt directly, which is why anglers were among the first to move to LiFePO4. A 36V lithium trolling motor bank can weigh a third of the lead-acid group it replaces, hold its voltage until the end of the day and recharge overnight from a marine charger. These guides explain how to get that result on your boat.
They cover the three jobs a marine battery does: driving a trolling motor at 12V, 24V or 36V, running house loads such as electronics, livewells and lighting, and starting an outboard, which needs a battery designed for cranking current. Sizing guides work through runtime for a given motor and fish finder, and the comparison guides set lithium against AGM for the marine environment specifically: vibration, moisture, charging from an outboard and long storage.
Read the complete marine guide first, then the trolling motor and runtime guides for your setup. Every recommendation here matches the ABYC-informed practice the support team follows.