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Originally Posted by bat119

I think it's because you run lead acid to 50% capacity Lithium can go to 10% before charging

https://www.ablithium.ca/product/12v...ttery-800-cca/

I run my lithiums right down to dead - with no apparent ill effects.

The only problem I’ve had is that they run at full power, until they run right out - no warning of lessening power. With a trolling motor - that means that you need a back-up battery to get back to the launch! I use a separate 10ah for my sonar, and that’s enough to get me straight back to the launch when the main 50 ah abruptly runs out!