GODOX WB400P for AD400 Pro Battery Replacement, 2600mAh 21.6V Li-ion Battery Pack AD400Pro Flash Strobe Speedlite Speedlight

OverviewCapacity: 2600mAh DC 21.6V, 390 times full power flashes, Recycle in 0.01-0.1 second. When the battery can't be charged, please press the battery button several times to activate the battery (the right part of the battery button). The battery button is next to the battery indicator. 【Upgraded function】The battery will enter a hibernation state after a period of no use, this is an upgraded function to protect the battery performance and extend battery life. Only need to press the battery button a few times to activate the battery, and then it can be charged normally. 【Battery Maintenance】 1.Please charge the battery to approx. 60% before being placed for long time. 2.If the battery had ceased using for over 3 months, please make a full recharge.