I just bought a Lavabox. When i recieved it i recogniced that there is no battery icon on the screen and i can't fire the mod. I removed the battery from the box and put it back in, then the battery icon was visible and everything worked like a charm. Then i just let the mod sitting on my table for an hour or so (fully charged). When i came back and wanted to use it the battery icon was gone again and the mod didn't fire. Removed the battery again, put it back, everything's fine. After a while the same problem appeared - no icon, mod won't fire.
What's wrong with my device?