The best feature is here， it supports DC 5V\/2A 9V\/2A 12V\/1.5A and fast charging. In  a test on 20000 &amp;amp; 10000 mAh Mi Power bank， just  3 hours time， the new power bank managed to charge and store up to 11000 mAh while the other one just up to 5000 mAh. <br><br><br><br>Optimized charging\/discharging efficiencyUp to 93% conversion rateWorld-class chips built into the power bank are not only safer， but improve charging conversion rate and stabilize discharging voltage with advanced resistance-capcitance sensors to optimize efficiency and durability.<br> <br> Description: Battery capacity: 19020\/20000mAh 68.47\/72Wh (MIN\/TYP) Interface: Micro USB(input)， USB(output)Input:  DC 5V\/2A 9V\/2A 12V\/1.5AOutput: 2*DC 5.1V\/2A MAX 3.6ACharging time: about 7 hoursCharge temperature: 0\u2103-45\u2103Discharge temperature: -20\u2103~+60\u2103Size: 141.9X73X21.8 mmWeight: 338g Function: Support Quick Charge 2.0 Input Short-circuit Protection， Input Overvoltage Protection， Output Over-Current Protection， Onput Overvoltage Protection， Over-charge Protection.Four LEDs to show battery level.<br>Compatible with iPhone， HTC， Samsung， smartphone and Tablet PC(the power bank will adjust the output power automatically to meet different devices' needs)Human engineering round conner design， more comfortable to handle.With anodic oxidation technology.<br>Package include:<br>1 x Power Bank1 x USB Cable    1 x manual