This is the battery I use, comes with charger. I have had it for over two years and it still does 2.5-3 full days on one charge.
https://www.amazon.com/gp/aw/d/B01DO...s=bienno+power
I also soldered a harness on that connects to a waterproof plug. The same ones that are utilized on hobie bait tanks. I bought an extra set to convert my charger from the alligator clips to this plug as well.
https://www.amazon.com/gp/aw/d/B004D...5KL&ref=plSrch
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