I've a flashlight about 10 years and it's using only powerless ordinary light bulbs. I changed it with a 1w led and throw these huge " D" type batteries away. Then i add small container in it. I put small 16gb flash disk but you can put anything that you want, for example tinder, matches, sewing thread, needle and another useful stuff. Let's build it.
Materials you need;
- Old Flashlight
- 1W LED
- 1W LED 45 degree lens
- Some wire
- 9V Battery and Clip
- Wire Stripper(optional)
- 220 Ohm Resistor
- Piece of pipe that fits firmly
- A stopper that close one end of the pipe
Step 1: Disassembly and Put LED Pieces Together
Just disassemble every piece of flashlight. Assemble the led into the lens and wrap it with aluminum tape. Then hotglue it to the reflector piece of old flashlight.