TP-Link PB20000 is a ultra high capacity 20000 mAh Power Bank with superior Li-Polymer battery. Li-Polymer battery is thin and lightweight while it also improves safety, leading to its wide applications in premium digital devices. This high capacity charger has 2 high-speed charging ports which provide up to 2. 1A adaptive power output. Powered by TP-Link Smart Charging technology, these output ports can intelligently recognize different products and are designed to be capable of delivering appropriate power for devices with large and tiny battery respectively. Housed in a portable design, TL-PB20000 is a high capacity 20000mAh power bank compatible with most of your digital devices. With full capacity, it can hold enough juice to fully charge your device multiple times. Supporting 5V/2. 1A recharging speed, TL-PB20000 can quickly recover from empty to full capacity, saving much time as models supporting 5V/1A do. You can charge the power bank and your devices simultaneously. It’s perfect for travel to carry a sufficient back-up power and certified safety. The multiple electronic protections ensure reliable power for you and your devices.