These lithium-ion 16340 batteries provide high performance and can be recharged up to 500 times saving you money in the long run. Each battery comes equipped with a built-in circuit protecting board and triple over-heat protection, so you don't have to worry your brand expensive light cutting short on you.

Features
Higher energy density
500 recharge cycles
Triple over-heat protection
Free from leakage of liquid electrolyte
Over-discharge protection
High capacity at low temperature (-10°C)
Higher capacity and lower weight than other rechargeable batteries

Specification
Battery Size: 16340 (RCR123A)| Capacity: 650mAh | Chemistry: Li-ion
Voltage: 3.7V | Charge current: 325mA (0.5C)
Maximum Charge Current: 650mA (1C) | Maximum Discharge Current: 1500mA (2C)
Size: Diameter: 0.66" (16.8mm) X Height: 1.32" (33.7mm)
Weight: 0.56 oz (16g)