Yeah, once every two days I switch the cases on the charger so I have a brand new battery on my phone. Beats the hell out of being tethered to a wall or worrying about running out of battery while I’m out. These turn themselves off automatically when the phone is fully charged, so I’m only ever charging my phone battery once it’s basically depleted and it stops once it’s full. Best of both worlds; better for the life of the phone battery and never worry about my phone dying