Humminbird 565 Portable 12V 7Ah Fish Finder Replacement LITHIUM NCM Battery

It is specifically designed for use in high and low drain devices, as well as solar/wind devices. Ultramax 12v 7Ah Lithium Nickel Manganese Cobalt Oxide (LiNiMnCo, NMC, NCM) Battery. While NCM’s lithium-ions can move in two different directions, LiFePO4’s lithium-ions can only move in in one single direction.

eBay