Main Features:- 20000mAh High Capacity20000mAh portable power bank gives you enough power to keep going for a long journeyBuilt-in high-quality and safe Li-polymer battery, good efficiency for energy storage- Dual USB Constant Power OutputsAdopts constant power technology dual outputs with 1A / 2.1A currents, can charge phones, pads or other small electronic devices simultaneously- Intimate DesignLED indicator light to notify the user of the remaining capacitySet up an ON / OFF button, check the capacity, easily complete the operation by one switch button- High-quality Material Made of environmentally friendly ABS and PC fireproof materials with arc edge design, scratch resistant and high temperature resistant, provide a comfortable hand feeling- Fine WorkmanshipThree different processes with three different types of touch, smooth, granular and grain texture, highlight the quality of elegance and fashion, enrich the visual experience and increase the non-slip effectprovides a comfortable hand feeling- Multiple Security Protections8 kinds of safety protections: short circuit, temperature, over voltage, overcharging, over discharging, over current, over power and reverse polarity protectionParameters:Capacity: 20000mAh, 74Wh / 3.7VRated capacity: 13000mAhBattery type: Li-polymer batteryInput: 5V / 2.1AOutput: 5V / 1A, 2.1ACharging time: about 13 hours (2.1A)