The DOeRR solar panel PB-10000 XL is a particularly powerful energy source, which is ideal for self-sufficient use in order to continuously supply mobile devices and other potential consumers with power. In order to ensure an ideal energy intake, three mono-crystalline solar cells are used, which have a peak power of 21 watt.Whether trekking tours, camping or bus craft - with the PB-10000 XL solar panel you can quickly and reliably charge your smartphone, tablet or other devices with a USB port. 2 USB outputs are available for simultaneous charging of up to two mobile devices. These 21 W solar cells can either charge your mobile device directly, or use the integrated power bank to store energy later on. The powerful 10,000mAh lithium-polymer battery stores the energy reliably and charges your devices even when there is no sunshine available. For the best preparation of your outdoor adventure, you can charge the battery of the solar panel directly via the 5V/2.1A Micro USB input - durin