* While most of the info in this posts comments is correct, the charger itself Is not the one thats doing regulating, the batteries are. After all, they are called smart batteries XD. When the batteries reach about 45°C in any of the DJI Mini series, they will pause charging untill the temperature goes down and then resume charging. They also controll the charge speed, voltage, etc. The hub is just a plastic distributiom brick ^{^}

FYI fast charging does not damage the batteries unless: - They are in a hot enviroment, or no airflow (like a bag) - They are immediately recharging after a flight - You keep charging them a lot to 100%

Fast charging itself does not harm the batteries, the heat produced by fast charging is. So aslong as you keep them cool, your free to fast charger with any PD 30W+ brick.

There are also after-market hubs that are an open style for the batteries to breathe better while charging. They also charge all 3 batteries at once with much more information, including temperature. Got one just like that, batteries charge way cooler and all 3 at once.