Bioenno PowerBLF-1209WS 12V 9Ah LFP LiFePO4 Lithium Iron Phosphate Battery - 18A Max

I use it to power a Lowrance HDS7 Sonar and it gives me a full day of fishing. It is lightweight and last longer than the Hobie supplied 12volt battery. It also recharges much faster.

Great Battery, Light weight to power my fish finder on the kayak where weight is critical