We are Starlight technology (china) limited based in Shenzhen , China. We are member of Tradekey.com since August, 2010. Our business is related to Electrical & Electronics Supplies industry and we specifically deal in iphone battery,iPhone parts,case for iPhone,iphone 4 battery. Please find our product details below: iPhone case iPhone case Weight:£º55g Capacity£º1600mAh Cell type£ºLi Polymer battery Dimension£º126¡Á65¡Á20(mm) Output voltage£º5V Output current£º500 mA max Cycle life£º500times Function& character: Signature£º Standby Time ¨C Up to 300 hours Talk Time ¨C Up to 5 hours on 3G | Up to 10 hours on 2G Internet Use ¨C Up to 5 hours on 3G | Up to 5.5 hours on Wi-Fi Audio Playback ¨C Up to 20 hours Video Playback ¨C Up to 5 hours Thank you for taking the time to go through our business profile. If there are any question, inquiry or comments, please feel free to contact us.