PRODA E5 Portable USB Power Bank 5000mAH    High quality 18650 lithium batteries, Charge and discharge over 700 times which is 2 times more than ordinary battery.    Intelligent current control: when phone power is low, the current will be adjusted to large. when phone power is sufficient ,the current will be adjusted to small Smart IC ,fast and stable charging    Piano coating case ,fashion and quality assurance.    Super compatible with the market 99.9 percent of smartphones, tablets, i-Phone, MP3 / 4, PSP, GPS and other digital devices    Multiple protection to ensure safe working     Portable power box, compatible with a variety of electronic devices, smart phones, tablets, Bluetooth headset for iPhone and iPad.    Built-in rechargeable battery, simple design.    High efficiency of power conversion with Electricity-saving function , Portable, practical and long cycle life.    Safe and reliable, perfect for using on traveling and outdoor activities.Batteries Type: 18650 lithium batteries    Capacity batteries: 5000MAH   Operating temperature: 5 ° C-45 ° C  Intelligent LED power indicator: Yes        Material: ABS heat-resistant fire prevention materials        Switch mode: Auto-sensing        Input: DC5V-1A        Input Current: 1A        Output: DC5V / 1A     Conversion efficiency: 91%    Charge and discharge cycle:> 700    Charging time: 4 Hours        Recyclable and long life use.        Stable and safe With over charge protection.        Over voltage protection, short-circuit protection,        over-current protection, over discharge protection.        current-limiting protection              Easy to keep in bag or pocket.        Very small and light power bank.        Compact & lightweight.        Support all kind of mobile phone.