This charging dock cradle is specifically designed for LG G4.
Function: Data synchronization + Phone charger + Phone holder + Charging Spare Battery (not include battery) Stable phone holder allows to watch movies without hand holding all the time.Small portable design, easy for cell phone charging with travel
Notes:1. The dock is equivalent of a connector. If adapter output voltage is not enough, maybe cannot charge phone and battery at the same time. Just work either. If the special adapter over 18w (quick charger 2.0, quick charger 3.0 )have enough output voltage, both battery and phone are charging. 2. The dock works with TPU / PC slim case or without case.