GPX310 Scion Rechargeable Battery Kit Allows you to operate the Scion thermal imaging monoculars for up to 10 hours, and its high-capacity 8.5 Ah battery pack features a smart fuel gauge that displays on-screen battery life when the unit is on. The added electronics protection helps prevent battery-related safety incidents. Specifications:Number of Cells: 3Configuration: ParallelTotal Capacity: 8.5 Ah; 32WTotal Voltage: 3.7 VDCOperating Temperature: -22 to 104°F (-30 to 40°C) Storage Temperature: -40 to 158°F (-40 to 70°C)