Specifications:

Rated capacity: 2100mAh (high drain)

Minimum capacity: 2000mAh

Initial discharging current: 15A

Maximum continuous charging current: 6.5A

Maximum continuous discharging current: 30A

Voltage: 3.8V

Nominal operating voltage: 3.2V

Maximum charge voltage: 4.2V

Discharge cut-off voltage: 2.5V

Dimensions: 65.0mm (L) x 18.2mm (D)

Note: Sony VTC4 IMR cells have a much lower internal resistance than regular 3.7V lithium ions. Voltage could go higher when charged on certain chargers such as the older versions of the WF-139 charger. Always check the voltage of your 18650 IMR battery after a full charge to make sure it is above 4.2V. You can use a multimeter to do this. Overcharging your Sony VTC4 above 4.25V may shorten the life cycle or even cause permanent damage to the product.