Connect two CrystalSky & Cendence Intelligent Batteries and charge them in sequence. The battery with more stored power will charge first.

Compatible Chargers to use to power the Hub:

Inspire 2 Battery Charger (IN2C180)
Inspire 2 Battery Charger (ADE018)
Inspire 2 Car Charger (C6S90-2)
Inspire 1 100 W Battery Charger (A14-100P1A)
Inspire 1 180 W Battery Charger (ADE018)
Inspire 1 Car Charger (C6S90)
Phantom 4 Series Battery Charger (PH4C100)
Phantom 4 Series 160W Battery Charger (PH4C160)
Phantom 4 Car Charger (C6S90)
Phantom 3 Professional Battery Charger (ADE019)
Phantom 3 Car Charger (C4S90)
*Phantom 3 57 W Battery Charger (A14-057N1A)
*Osmo 57 W Battery Charger (A14-057N1A)