The BANNER Bike Bull AGM Battery is completely maintenance-free and entirely leak-proof. This battery utilizes AGM technology (AGM = absorbent glass mat), meaning it contains a glass mat inside that absorbs the acid. After filling, the batteries are sealed and must not be reopened, as opening will destroy the battery. This battery is primarily used in motocross, ATVs, jet skis, snowmobiles, and more. Its robust construction ensures reliability and longevity, making it a popular choice for demanding applications where performance and durability are critical.