Valve Regulated Sealed Lead Acid Battery UPS Battery 12V 100AH key features 1:sealed and maintenance free operation 2:sealed lead acid maintenance free battery 3:safety valve installation for explosion proof. 4:Copper-coated Silver termimals. 5:Proprietary Pb-Sn alloy with addition of Ca for positive grid 6:Stable quality&high reliability 7:Accurate acid filler kept the amount of the electrolyte in each cell precisely 8:Equalization charges are not required and cycle or standby (or float) use 9:High quality AGM separator: extend cycle life and prevent micro short circuit 10:advanced welding machine ,not easy shourt-circuit ,ensure batteries long life 11:High discharging performance: With smooth discharging voltage and mild discharging platform main application alarm systems,marine equipment,Control equipment,cable television ,medical equipment, Alarm systems,emergency lighting systems,Power tools,etc.