Batteries are constructed in several ways. There are wet-cell (flooded-acid) batteries, sealed batteries, and Gel-cell and absorbed glass mat (AGM) types. We prefer using non-wet types in off-road vehicles as there is no liquid acid to spill and these batteries are completely safe in a rollover or other accident. When using a Gel or AGM battery, make sure the charger has a setting for Gel or AGM. It’s important to note that using a regular automotive charger on these batteries can cause them to overcharge.