Meet the ASMO Charger: an intelligent phone charger that not only recharges your devices but also shuts down and disconnects from the grid when you unplug your device. That means you don’t waste any energy when your phone is not connected. The ASMO charger can handle most electronic devices, including tablets, smartphones, MP3 players, and cameras.
The “automatic start” function is compatible with iPhone 4, iPads, Samsung Galaxy S2 and later devices (ASMO uses a small amount of power from your smartphone battery to start the flow of energy). The “automatic stop” feature works with all devices. This intelligent, firesafe charger is on Kickstarter right now. You can get it for $29 if you are an early supporter.[where to get it]