With the Sandberg Outdoor Solar Powerbank 10000 you can charge the battery of your smartphone up to 4 times. Nevertheless, it is super compact and light. Important when you are travelling with your backpack. The powerbank is equipped with an efficient solar module 'Made in USA'. It generates enough power on a sunny day to give your smartphone an extra... charge. The IP66-rated shell of the powerbank protects against any weather and can even brave snow, hang from your backpack during a river crossing and even be dropped in desert sand.