COOMAX C4 2600mAh USB Power Bank Portable External Battery Charger For iPhone 4S 5C 5S HTC - Color Yellow Ultra Slim Size with 24 x 24 x 99 mm(0.9 x 0.9 x 3.9 inches) and only 64 grams(2.3 oz) weight, Compact & Lightweight Brand New and high quality , Beautiful curve modelling design and Good touch feeling Battery Capacity: 2600 mAH , Keep your cell phone, iPod, MP3 Player or other devices that charges via USB Slip it in your bag or purse and you can keep your phone working even when you're on the go. Powered up at all times with the Power Bank Backup Battery Charger , Simply charge this backup battery charger using the included Micro-USB cable