User Review: Ozark Trail LED Rechargeable Lantern
the battery for anyone trying to use the unit is six (6) volt and the outside says a 9 volt house will work and a 12 volt car charger will do the trick but that means they packaged the charger etc wrong as that much juice in that battery will melt it or cause a fire.
Just fyi, they are responsible for bad packaging as most people just follow directions without voltage knowledge. I wanted to buy a charger and saw all the trouble you other folks had so looked at the unit and am trying an old 5 volt unit I cut the cord on and am charging with to see how it will do.
Don't suggest you try unless you know what you are doing.