Opened up a new thermacell tonight our very first one finally gave up the ghost. Or so I thought I managed to open it and fix a cracked piece inside. Should get another season out of it if I’m lucky 
Discussion
I had bought one of the electric USB ones many years ago, tried it outside around the campfire and it didn't seem to do much. The other day the mosquitoes were bad in the hightunnel so I decided to give it another try. It worked really well.