The 17340 / CR123A rechargeable lithium LiFePO4 battery is with high energy density and widest operating temperature range longest shelf life. The rechargeable design is environmental friendly. The battery is the best replacement for the most of CR123A primary lithium battery for digital cameras and flashlights. - Rechargeable LiFePO4 17340/CR123A 3.0V 350mAh Battery - Life cycle: 2000 times (Traditional Li-ion: 500 times) - Never explode or catch fire - 100% Compatible with Disposable 17340/CR123A Batteries - Working Voltage:3.2V and Peak Voltage: 3.6V - Charging cut-off voltage: 3.6V - Discharge cut-off voltage: 2.2V - Please never overdischarge battery below 2.2V/cell - You can safely charge these using the Ultrafire WF-138 Chargers set to the 3.0V mode - Do not charge these with any lithium chargers for regular 3.6V batteries as they can have up to 4.2V charging voltage! - Capacity: 350 mAh