Powersonic PS-1250F2-12 Volt/5 Amp Hour Sealed Lead Acid Battery with 0.250 Fast-on Connector Sealed/Maintenance-Free - The valve regulated, spill-proof construction allows troublefree Our batteries incorporate a series of one-way low pressure valves. Batteries may be used in series and/or parallel to obtain choice of voltage and capacity. The high impact resistant battery case is made of nonconductive ABS plastic to UL94-HB. Power-Sonic batteries may be discharged over a temperature range of -40C to +60C (-40F to +140F)