... Circle:more than 500 times 4000mAh Power Bank for iphone,mobile phone,smartphone,ipod Battery Type Li ... ,over voltage,short circuit protection.How to charge for device:1.Use standard cable or your original ... connect the device and power bank.3,turn on power bank.4,While cherging device,the LED ... after 20 minutes' disconnection. Power bank,5V4000mAh,portable power,for iphone,mobile phone,smartphone,ipod