Support phone while sitting at an angle
Charges spare OEM battery while docked or otherwise
LEDs to show charging status
Will not fit with a case on the phone. Best buy - buy a quickly removable case (such as TPU Cases)
I don't have stock rom so I can't verify this triggers the phone for Dock Mode. Somebody will have to verify!
Once the spare battery is charged I flip it over to just hold the battery until I'm ready to use it.
PS: Does not throw my phone into a boot loop!!!
Love the purchase.