Solar Panel Power 20W AC Output+Solar/AC Input USB to charge ... lamp with 5M cableCharging timeAbout 9-10 hours (by solar panel)Charging indicatoryesAdapterOutput DC12V, USB5V. ( by option)Working ... , Village, Country area, Camping ,Adventure Activity etcFeatures Solar power charge, easy to useLong working life, Li ... break up, beat, knock at or carry solar system3.In order to keep the battery a long ...