Sandberg Outdoor Solar Powerbank 16000 is a portable battery that is charged via a USB port or the integrated solar cells. With Sandberg Outdoor Solar Powerbank 16000 mAh in your luggage, you will never again have an empty battery on your phone or mobile device when there is no socket nearby to charge it. A standard smartphone can be charged... up to 6 times with it. The robust and waterproof packaging ensures that it is ready to use anywhere. You can charge up to two devices at the same time.