ChargeSMART Patented design uses an eco-friendly Supercapacitor and intelligent components to communicate with mobile devices and deliver power only when needed. The charger shuts off when devices no longer requires power, stops drawing power when device is disconnected, and automatically turns on when a cell phone is attached. Stop wasting energy and money on cheap and inefficient phone charges and invest in the Bussmann ChargeSMART! Works with all major brands.