Mosquito bats work great for killing mosquitoes and flies. Until they don’t work! They hardly last one mosquito generation. It turns out that the rechargeable battery in them go bad fairly quickly. So as a small hack, I took out the cheap battery they come with and replaced it with a decent rechargeable LiIon 3.7v 2200mah one. You have to modify the battery housing a little bit by carving out some extra bits of plastic to make the 18650 type battery to fit. It seems a bit more solid now. Now the mosquitoes won’t know what zapped their asses.

Myaahhaaha!