How To Tell If Mophie Is Fully Charged. When turned on the battery case charges your phone. If the battery is fully charged all lights are solid.

All status lights briefly turn solid followed by solid light at each charge level and a blinking light at the current charge level. Ill let it charge the iPhone. This should just work.
It will just take a long time to charge since the car charger probably only delivers 5V 1 amp.
The battery is not fully charged until all 4 lights are illuminated which. If the battery is fully charged all lights are solid. To charge the battery while its attached with your phone. Also handy later when its charged and the iPhone is dead.

