Lead-Acid Battery Dimensions ? x H: 34 x 61 mm Temperature range, discharge: -40...+65 °C Charging voltage: 2.45...2.50 VDC Charging voltage per cell: 2.45...2.50 V Internal resistance: 5 mOhm Material: Lead Service life: 8 Years Termination type: Blade Terminal 4.8 mm Capacity: 2.5 Ah Voltage: 2 V