Mini USB Car Charger Vehicle Power Adapter Cigarette Lighter (PLUS FREE SCALAR ANTI RADIATION CHIP) for Tmobile Samsung Vibrant - ATT Sharp FX Plus - ATT Sony Ericsson Ion - Sony Ericsson Xperia Arc - ATT Sony Ericsson Xperia Play 4G Plug never heats or overcharges the battery.Intelligent IC chip inside recognizes a full battery and automatically switch to a saver. You must have a USB charging cable (sold separately) inorder to charge your device with this charger. Single piece construction. Converts cigarette lighter to 1 USB port for charging. FREE GIFT; SCALAR ANTI-RADIATION STICKER TO PREVENT BRAIN DAMAGE IN THE LONG RUN - MADE IN JAPAN ORIGINAL (WORTH $2.99).