Here are some super simple homemade battery case method I have collected,
1, with two bamboo clip taking out clothing, fixed on a piece of wood
2, with cardboard to make a small square box, two stuffed barbecue with foil
3, the length of the thickness of a suitable plastic pipe
4, attached directly to the aluminum foil across the battery terminals, with tape wrapped around the prison
5. The combination of plastic pipe and bamboo clip, can be made more sections of the battery pack
6, the wire soldered directly to the battery!
7, for button batteries, copper paste poles, fixed with hot melt adhesive
I have to add one, with a thickness suitable disposable syringes, and syringe piston may also be used as switches, push in the circuit is turned on, pull the circuit is broken. If you think these steps are too complicated, then you can consider direct purchase, AAA Battery protection box will be your best choice.