Brand UltraFire Color Yellow + white + red Quantity 2 Type Li-ion battery Model 18650 Mark Capacity 3600 Actual Capacity 2200 Battery Voltage 3.7 V Rechargeable Yes PCB Protected Board Yes Application Power supply Other Features Discharge cut off voltage: 2.75V; Charging Current: 0.2C~0.5C; Over charging test voltage: 4.25V~4.35V; Remove charging voltage: 4.05~4.15V; Over discharge test voltage: 2.5V +/- 0.1A; Remove discharge voltage: 3.0V +/- 0.1V; Over current protection current: 3A +/- 1A; Charging Method: CC / CV; Operating Temperature: 0'C~45'C; Discharge Temperature: -20'C~60'C Packing List 2 x 18650 batteries