20000mAh battery power bank packs not only for portable charging but also around the home. Allowing you charge mobile devices without having to be tethered to a plug socket. Dual Output & Input: Each has 2 USB output ports that detect all the connected devices and efficiently distributes the current output up to 5V 2.1A. The USB C and Micro USB ports can fully refill the battery itself in 10 hrs at 5V 2.0A.Reliable Li-polymer Cell: Thanks to the Li-polymer battery pack, the charger is much safer than any Lion charger. Also, it's lighter and slimer that you can easily carry it around, even on airplanes.Handy: It feels incredibly compact for a 20000mAh power bank, weighing just only 21mm thick. Grippy design is easy to hold, easy to toss into a bag and incredibly portable. 10000mAh battery power bank packs not only for portable charging but also around the home. Allowing you charge mobile devices without having to be tethered to a plug socket.Dual Output & Input: Each has 2 USB output ports that detect all the connected devices and efficiently distributes the current output up to 5V 2.1A. The USB C and Micro USB ports can fully refill the battery itself in 10 hrs at 5V 2.0A.Reliable Li-polymer Cell: Thanks to the Li-polymer battery pack, the charger is much safer than any Lion charger. Also, it's lighter and slimer that you can easily carry it around, even on airplanes.Handy: It feels incredibly compact for a 20000mAh power bank, weighing just only 21mm thick. Grippy design is easy to hold, easy to toss into a bag and incredibly portable.