The KBL12260 Kaise 12V 40Ah Deep Cycle Battery is a rechargeable AGM battery (equivalent to GEL), which has a much longer discharge time compared to other batteries mainly due to its alloy and its high quality AGM separator. (Absorbent Fiberglass Mesh) that extends the life cycle of batteries and prevents short circuits. This battery considerably reduces self-discharge, is maintenance-free, sealed with a VRLA valve and can be used in any position as it does not produce spills.