This Design Idea describes a high-intensity, rechargeable flashlight system that you can build from a 6V lantern-type flashlight. The rechargeable battery comprises four 2V, 2.5-Ahr (ampere-hour) SLA ...

If you have an old rechargeable lantern on hand you can add a few parts and make your own bug zapper! In addition to the lantern you'll need a 6V sealed lead acid battery, a blacklight, small wooden ...