The most powerful combination - Ultra-high capacity: 20000mAh - Safe and powerful 20000mAh. Ultra-high capacity. - The 20000mAh battery can power up for your mobile device many times. You never 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 designed with compatibility in mind, and compatible with 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-protection functions are meticulously considered in its engineering, fully safeguarding enjoyment in every charging-up.