The P4 Battery Charging Hub - when connected to your 240V Phantom 4 Charger - can fully charge up to three batteries in sequence. But unlike previous DJI multi-charger hubs, it includes a selectable Storage Mode which sets a battery storage charge of 50%, the safest level to store all LiPo batteries.

And the really neat trick is that it will both charge AND discharge to reach that level, depending on the existing charge of each battery. For example, if you select Storage Mode and insert three batteries - one at 20%, one at 40% and one at 90% - it will automatically charge the first two and discharge the last one until all are at 50%.

In addition, if all batteries require discharge only, the device doesn't even need to be connected to power! Just turn on the batteries and leave them in the slots - they will turn off when they hit 50% (assuming they were all above 50% to start with). This is great news for owners who want to get the maximum possible flights out of their expensive batteries without the messing around to partially charge and discharge them.

The Hub is compatible with Phantom 4 and Phantom 4 Pro batteries.

Camzilla gives this device 5 stars!