Lithium 100 AH battery and charger

Product Description

A lithium battery has an expected life of 10 years vs. 3 years for conventional lead-acid trolling motor batteries. So yes, you pay more up front but you get 3 times the life. In addition, you get more miles per charge for the same amp-hour rating,  because the lithium battery continues to put out full voltage until it is almost dead, whereas the conventional lead acid battery loses voltage steadily while it is powering your motor. It requires a special charger, so we sell battery and charger together as one bundle. Make sure you take into account the cost of a charger if doing price comparisons to a battery-only price.   Finally, the weight of a lithium battery is less than half that of a comparable lead-acid battery. This battery is ONLY 30 POUNDS!

How far can you go on this battery?  With most boats, most motors, most conditions the range would be 5 to 10 miles if you start with a full charge.  

If you are fighting a current or a headwind, that reduces range.  A tail wind or favorable current increases range.   Heavier and/or less streamlined boats will have less range.  If you go at a medium speed you'll have more range than if you go at top speed.

Here is the basis for this range estimate:   A 36-pound thrust trolling motor draws about 29 amps at top speed.  So it should run for 3+ hours on a 100 amp hour battery (100/29 > 3).  A lightweight, low-drag boat facing no headwind should go 3 to 4 miles per hour at top speed on this trolling motor.  So, in theory, range would be 9 to 12 miles.   

Alternatively, a 55-pound-thrust motor would draw about 52 amps at top speed and propel the boat at, perhaps, 5 mph.  It would run for just under two hours and so at top speed range would be not quite 10 miles.   Your boat might only do 3 mph under a given set of conditions, in which case figure range of just under 6 miles.   

No guantees on range:  As you can see, there are many variables that matter.  If you want more range, carry two batteries.   Contact us for a package.