GPL Series is a general purpose battery up to 10 years design life under normal float charge at 25? (77?).As with all CSB batteries, all are rechargeable, highly efficient, leak proof and maintenance free. .   ................................................................................................................................................................................... Series Info VRLA Battery Applications VRLA Battery Precautions VRLA Battery Warnings VRLA Battery Features VRLA Battery Handling Cautions VRLA Battery Dangers VRLA Battery Cautions ................................................................................................................................................................................... Technical Info Terminal Position Terminal Voltage (V) and Discharge Time Terminal Type Cycle Service Life Temperature and Discharge Capacity Trickle (or float) Service Life Discharge Current and Final Discharge Voltage For Standby Use For Cycle Use Series GPL672 GPL1272 GPL12120 GPL12260 GPL12400 GPL12520 GPL12750 GPL12880 GPL121000