Time for Lithium Batteries in Your Boat?
From Frank Sargeant

Lithium batteries have seen amazing growth in the fishing/boating biz over the last decade despite prices that are as much as 10 times higher than the conventional lead-acid batteries most of us are familiar with in our cars, trucks and boats.
Lithium-based batteries have a couple of huge advantages when they’re built right, which is why many serious boaters have invested in them despite the very high prices.
The most obvious is the extremely light weight, about 1/3 of what a lead-acid battery of similar output weighs, or even less in the case of the 36 volt models that can replace three lead-acid 12-volt batteries. Less weight is particularly important in smaller boats like flats boats, bass boats and kayaks, allowing them to float in less water and also deliver better performance.
![]() Norsk is Among lithium batteries that can be monitored via bluetooth on any smartphone (Norse photo, with permission.
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In the case of a flats boat with a 36-volt troller, the difference can be whether or not you can get up on a 12” deep flat or not. In bass boats, all that extra weight at the transom can mean water over the aft deck when you drop off plane quickly, and the weight also cuts top speed and reduces fuel economy.
The fact that one 36-volt battery takes the physical space of one 12-volt battery can also be huge in boats where space is limited. Read more