Expertpower Sealed Lead Acid Batteries Are Made With The Highest Quality Materials Available. The High-Impact Resistant Battery Case Is Made Up Of A Non-Conductive Abs Plastic. This Material Has A Strong Resistance To Shock, Vibration, Chemicals And Heat. Expertpower Batteries Are Built For Performance, But They Are Also Built To Last. In Our Agm Sealed Batteries, The Acid Inside Is Absorbed Between The Plates And Thereby Immobilized By A Very Fine Fiberglass Mat. This Along With The Valve Regulated, Spill-Proof Construction Of Our Batteries Allows Trouble-­Free, Safe Operation In Any Position.