Aibocn 8000mAh Portable Power Bank External Battery Pack for Phone Tablet, Smart Charge for iPhones, Galaxy and More(Dual USB) Tough Material, anti-finger and super lightweight. Only palm size, ultra compact for your bag purse. Rigorous testing ensure high quality: 4000times pluging test, 3000times bending test and more. Compact perfectly with phone tablets MP3 MP3 E-readers Bluetooth devices more, could freely charge your iPhone 5S about 4 times, Samsung Galaxy S4 about 2.5 times, iPad Mini 1.5 times. Multiple Protection: Devices are protected against short-circuit, over-current, overcharge in re-charging for total safety. Double USB ports could allow you to charge your 2 phones at the same time, more convenient.