Recharge with a Micro USB Cable 
The AUKEY PB-AT10 Power Bank can be recharged using micro USBcable

Qualcomm Quick Charge 3.0 
Engineered to refuel devices up to 4x faster than conventionalcharging. Powered by INOV (Intelligent Negotiation for OptimumVoltage) Technology for fine-tuned power output and more optimizedcharging cycles. Up to 45% more efficient than Quick Charge2.0.

Universal Compatibility 
Keep your devices charged on the go with dual USB charging ports.Equipped with built-in flashlight and LED battery indicator.Designed to work with all popular USB powered devices from iPhonesto Android phones， tablets， photography gear， Bluetooth speakers，headphones and more. Whatever USB powered gear you've got， we'vegot you covered.

Specifications 
Capacity: 10500mAh 
Micro USB Input: 5V 2A 
Output 1 (Quick Charge 3.0): 3.6-6.5V 3A， 6.5V-9V 2A， 9V-12V1.5A 
Output 2 (AiPower): 5V 2.4A 
Size: 4u201d x 2.4" x 0.82" 
Weight: 7.7 oz

Battery Indicator Light 
Press the power button once to check the remaining battery level.Battery level is indicated by the color of the LED indicator light.green battery indicator light means your Power Bank is charging，when it reaches 100% the light will turn white. 
Red 0 - 30% 
Green 30% - 70% 
White 70% - 100%