ACDelco Absorbed Glass Mat (AGM) PowerSports Snowmobile, ATV, and Motorcycle Batteries are virtually spill proof and leak-proof when correctly filled and sealed. These batteries are shipped to you dry and unfilled in order to ensure maximum freshness. Once acid has been properly added to the battery, the fiberglass mat completely absorbs the acid making it virtually spill and leak-proof. These batteries require fewer charges and last longer. In fact, ACDelco AGM PowerSports Batteries hold their charge up to 3x longer than flooded batteries. They are 100% maintenance free, no liquid required once the battery is sealed, and engineered for vibration resistance for prolonged life. ACDelco AGM PowerSports Batteries are designed to meet Original Equipment specifications. PROPOSITION 65 WARNING: Battery posts, terminals and related accessories contain lead and lead compounds, chemicals known to the State of California to cause cancer,birth defects and other reproductive harm. Batteries also contain other chemicals known to the State of California to cause cancer. Wash hands after handling.