Cinch CP507 5000mAh External Battery pack for iPhone 4 4G, iPhone 3G 3GS, iPod Touch (1G 2G 3G4G), Motorola Droid , HTC Android Phones, Blackberry (curve, bold, tour, storm) Supplies iPhone 4, 3G, 3Gs and iTouch video play time up to 38 hours (with speakers on); Has a total of 400% volume of 3G 3Gs iPhone battery; Supplies iPhone 4, 3G, 3Gs internet time up to 38 hours; audio time up to 180 hours; It can charge all of the latest iPhone, iPod touch, all the latest iPod video classic & iPod Nano using the iPhone connector; It can also power the major brand cell phones, for example, BlackBerry, with the correct connectors; Battery Type : Advanced and reliable Polymer Lithium-ion Battery; Capacity : 5000mAh, 3.7V. Dimension : 99*72*18mm ( 3.9*2.2*0.6 inch ); Weight : 145g ( 5.1 ounces ); Nominal In-put : DC 5V, 1000mAh; Nominal Out-put : DC 5V, 950mAh. Cycle Life : Up to 500 cycles; Color : Black with Blue Indication Lights; Using Temperature : -10C ~ 45C;Recharging Time : About 3 ~ 4 hours.