Sandberg SemiSolidState Powerbank 20000 is a powerful powerbank with advanced semi-solid battery cells. providing increased safety and stable performance. even with fluctuating temperatures. With a whopping 20000 mAh capacity. you have plenty of power for multiple charges of both smartphones. tablets. and other mobile devices. It supports up to 20W USB-C charging. so you get efficient and fast charging on the go. The built-in display gives you a clear overview of how many percent are left on the battery. A perfect choice for travel. long days. or other situations where you don't want to run out of power.