Fast charging, charging on the go: The external battery supplies power to smartphones, tablets, Bluetooth speakers and other mobile devices - whether you're in the office, on a plane or at the beach. Power Pack provides an energy boost on the go. Optimised charging process protects the battery and thus extends the service life of your mobile, tablet, etc. Certified cells for the highest quality and safe charging: Overcharging, overvoltage, overheating and short-circuit protection. Small and light: The mobile charger fits in any pocket or hand luggage. Maximum compatibility for all mobile phones, tablets and other devices, e.g. smartwatch, digital camera or Bluetooth headphones. One charge of the powerful battery pack is enough to use the Samsung Galaxy S21+85 hours longer, for example. The power pack is fully charged in 9 hours via the USB-C port. Integrated LED capacity indicator: shows how much power is still available in four levels (100 %, 75 %, 50 %, 25 %). Input: USB-C. 2 outputs: 1x USB-C, 1x USB-A.