All Lead Acid Batteries contain sulfuric acid.
Flooded or wet lead acid batteries produce explosive mixtures of hydrogen and oxygen when charging and discharging. Because self-discharge action can generate hydrogen gas even when the battery is not in operation, make sure batteries are stored and worked on in well ventilated areas. Always wear safety glasses and a face shield when working on or near batteries.
Discover® Valve Regulated Deep Cycle and Traction Batteries are sealed and maintenance free and all sulfuric acid is immobilized and absorbed, and under normal operating conditions any gas produced is recombined and is not vented to the atmosphere.
All lead acid batteries – including sealed valve regulated batteries will vent gases if over charged.