Having switched from a group 31, 120 AH battery AGM to a LiFePO4 100 AH made a big difference in performance and run times for me.

Before the switch the AGM battery would get weak as the voltage dropped and the trolling motor performance suffered.

This would be especially true when using Spotlock in high winds.

Now, the LiFePO4 does not seem to lose power at all and has never ran down like the AGM battery.
Trolling motor power stays at max all day now unlike the AGM which got weaker.