... for the leading domestic level. 18650 unprotected board rechargeable battery 3.7V 2400mAh. Maximum height 67.0mm, diameter 18.3mm, ( ... Overcharge and over discharge protection, over-charging voltage 4.2V, over discharge voltage: 2.75V, the battery cycle life of ... over-discharge capabilities, comprehensive care of the safety of lithium batteries, and greatly extended battery life. This product export ...