NeoTek Iphone 4 4G Battery External Solar Charger USB Case Power Juice Pack By Coolshop A Smart 2400 mAh Solar Battery Case Can Be Used as A Mobile Power Terminal Also Charge Your iTouch, iPod Touch, HTC, Blackberry, Motorola, GPS... by Coolshop Smart Battery (Optimized to lengthen your iPhone performance time; No more out of power dilemma during important phone coversations) Solar panel can be constantly charged for the battery under sunshine. One hour of directly sunlight can charge the iPhone for 30 Mins talk time in 3G network and 60 Mins talk time in 2G network USB charging and SYNC without the need to disconnect your iPhone from the case (Mini USB cable included in package 4-LED indicators show you battery status. Each light means 25% power inside./ON/OFF Button for Optional Power Output Control Extra USB Power Outlet Transform this case into a mobile charging station for your other gadgets such as iPod touch, iTouch, HTC, Samsung, Blackberry, Motorola Cell Phones... Using a USB Cable