Pretty sure i'm in need of a new battery for my trolling motor, mine won't hold a charge like it did before and i spilled some acid out of the thing a couple weeks ago.  

I've been using a deep cycle marine battery to power the thing but god knows that battery is heavier than i'd like.  are there other battery options that i could look at to power my trolling motor for the day that don't weigh 50+lbs and won't break the bank?

 

Thanks!

Lithium are the lightest, but very pricey. 

 

In a lead acid, the AGM are lighter than flooded cell batteries because of their less water, but they also may not give you the run time, however, in a Kayak, an AGM would be all I would consider, since they don't spill. 

 

Best thing you can do is look at the battery you have and decide how it did for run time.  If you were running it down when it was a good battery, then you don't want to go smaller, one with less RESERVE MINUTES.  If you were coming back and half charge still in the battery, then you can look at a smaller battery. 

 

You have to remember, with lead acid batteries, it takes lead to make capacity (run time).  The only way you can reduce weight to any degree is to reduce run time which will be one with less lead.  Unless you go with another technology, like the lithium.

Wheel chair batteries, smaller, and lighter.