Remax Kooker RPP-59 is High capacity portable battery charger power bank with 20000mAh can be charged for smart phones.it comes with built-in 20000mAh high quality rechargeable polymer Li-ion battery.This power bank have battery indicator display the accurate percentage of power.Also it has Dual USB Outputs DC 5V / 2.1A output charge for Mobile Phones,Tablet,Camera,Speaker etc.Designed with ultra high conversion efficiency (> 80%) for best performance.Designed with safety technology with Over current protection,Short circuit protection,Overheat protection,Over discharge protection,Over voltage protectionCompatible with most smart phones.Technical specification: 1.Output Voltage: DC 5V2.Output Current: 5.0V / 2100mAh(max)3.Input Voltage/Current: 5.0V / 2000mAh4.Battery Capacity: 3.7V/20000mAh5.Battery type:Polymer lithium battery6.Full charging time(AC power): 10-12 hours.7.Applicable product: intelligent mobile,MP3,MP4,digital cameras etc.8.Input interface: Micro USB9.Output interface: dual usb output10.Functional characteristics: portable and convenient,high efficiency of power conversion,long cycle life,economic efficiency11.Weight: 366g  Safety 1. Over current protectionWhen the current increasing in an exception, power bank immediately Start voltage buffer function, ensure the voltage in a steady state at any time., Avoid cause your charging device any damage.2. Short circuit protectionWhen there is a short circuit occur in external device, power bank start Protection function, shut down the supply and avoid short circuit damage.3. Overheat protectionWhen the power bank work long in high temperature environments (Exceed 60 degrees), Power bank will not be dangerous due to the high temperatures.4. Over discharge protectionWhen power bank discharge reached the critical point, the circuit automatic start Protection function and stop discharge.5. Overcharge protectionLong time charge for mobile power supply or use power bank charge for the phone. When reach saturation point, system automatically shut down, avoiding the overload problems.6. Over voltage protectionLong time charge for mobile power supply or use power bank charge for the phone, When reach saturation point, in order to prevent over-voltage, the system automatically turns off. Conversion Rate 1. Usually there is internal resistance in all mobile. and power bank will lost power when you charge mobile because this internal resistance.     we called it is Conversion Rate2. About 10 to 12 hours charge can get the power bank full of power in normal times3. charging time depending on charger.the more,the faster4. the output power is different for every mobile. because mobile internal resistance is different.5. All the power bank has Conversion Rate,as well as your phone,Charge will happens twice energy conversion!