DOD Solar Pop-up Lantern LED Power Source: AA batteries (sold separately) USB charging and solar charging are possible when rechargeable batteries are installed. It features a very long continuous lighting time in night light mode. Besides camping, it seems useful as an emergency light for disasters, power outages, etc. I think I haven't used it much. I've taken it camping about 3 times. This is the main unit and the instruction manual. Storage Size: (approx.) Diameter 85 x H60mm Weight (including accessories): (approx.) 161g (Excluding batteries) Continuous Lighting Time: High Power Mode / 10 hours Normal Mode / 25 hours Night Light Mode / 80 hours Flickering Mode / 40 hours Brightness: High Power Mode / 200lm (White LED) Normal Mode / 100lm (Warm Color LED) Night Light / 20lm (Warm Color LED) Flickering Mode / Variable (Warm Color LED)