I´m currently not at home to check this myself, but is it possible to use a Phantom 4 charger with the Mavic 2 battery or the charging hub from the FMK?

With the Mavic 1 charging hub this should have been possible (never had a M1 to test this): https://store.dji.com/de/product ... arging-hub-advanced

Thank you for reaching DJI forum. If it is convenient for you, kindly provide a link of the charger and the charging hub that you are referring to. I just want to make sure that I can give you an accurate answer. Just a friendly reminder, It is not recommended to use the third-party accessories, we are unable to ensure the compatibility and the performance. Thanks for your support!

Ok, found out that this is not working since the P4 charging connector is a bit to thin. Everything else would fit, voltages are in between maximum ratings.
Maybe we see a passive adapter anytime.