Brand: BAK N18650CK 3000mAh Battery type: 18650 Lithium ion battery Nominal Voltage(V): 3.7V Nominal Capacity(mAh): 3000mAh Charge Voltage: 4.2V Discharge cut-off voltage: 2.75V Energy density: 222Wh/Kg Max charge current: 1C Max discharge current: 3C Internal resistance: ≤35mΩ Charge Temperature(℃): 0-45 Discharge Temperature(℃): -20~60 Storage Temperature(℃): -20~35 Cycle life: 1000times Weight(g): ≤48g Size(mm): 18*65mm Brand: BAK N18650CL 2900mAh Battery type: 18650 Lithium ion battery Nominal Voltage(V): 3.7V Nominal Capacity(mAh): 2900mAh Charge Voltage: 4.2V Discharge cut-off voltage: 2.75V Max charge current: 1C Max discharge current: 3C Internal resistance: ≤35mΩ Charge Temperature(℃): 0-45 Discharge Temperature(℃): -20~60 Storage Temperature(℃): -20~35 Cycle life: 1000times Weight(g): ≤48g Size(mm): 18*65mm Manufacturer BAK Model N18650CP Size 18650 Positive Terminal Flat Top Nominal Capacity 3350mAh Continuous Discharge Rating (max) 6.5A Nominal Voltage 3.6V Maximum Voltage 4.2V Discharge cut-off Voltage 2.5V Protected No Rechargeable Yes Approx. Dimensions 18.35mm x 64.85mm Approx. Weight 48g