The BANNER Bike Bull AGM Battery is completely maintenance-free and totally leak-proof. Featuring advanced AGM technology (Absorbent Glass Mat), this battery includes a fiberglass mat inside that binds the acid. Once filled, the batteries are sealed and must not be opened again, as opening them will destroy the battery. Ideal for use in motocross bikes, ATVs, jet skis, snowmobiles, and more, this battery offers robust performance in diverse environments.