The most powerful combination – Ultra-high capacity: 20000mAh – Safe and powerfu 20000mAh. Ultra-high capacity. – The 20000mAh battery can power up for your mobile device many times. You naver imagine how convenient it is for you in any long journey and busy business trip. High Compatibility – With the unique Fit Charge technology, polymos 20 was desinged wiht compatibility in mind, and compatible wiht a wide variety of smartphones, tablets PCs, and other mobile devices. Power up 2 Devices Simultaneously. – It juices up your phone and tablet PC at the same time with dual-output. 2.1A output charges your device at a full speed, saving more time for your work and life. Fully Safeguard. – Li-polymer battery and mult-portection functions are meticulously considered in tis engineering, fully safeguarding enjoyment in every charging-up.