Product: Rechargeable lithium battery

Brand: Panasonic

Model: NCR18650B (Panasonic 3100mAh for the NCR18650A)

Life: 1000 times

Voltage: standard 3.6-3.7V, filled with 4.35V, put 2.75V

Resistance: 40 milliohms or less

Capacity: 3400mah

Size: diameter 18mm, length 65mm