I keep seeing claims of "smallest" flash light, so I thought I'd try and make my own, it took about an hour.
Step 1: How Small Really?
The LED is from an old cell phone key board,
It would easily fit in a sugar cube, if I wanted to go smaller I guess I could use some hearing aid batteries but this was just stuff on hand.
Step 2: Cut the LED Free
I trimmed the led from the board with a band saw, then used wire cutters to cut off the unneeded circuit board.
Then I soldered some thin wire from a solenoid
Be sure to clean the coating off and pre-solder the wire end to make sure you'll get a good connection
Step 3: Solder the Cells
Solder the top and bottom terminals and place the two cells in a bit of heat shrink tubing
Come on every kid over 4 has made their own light it just isn't that hard
I will say trying to solder connections smaller than a pin head is quite a test of patience.
The cells were from a talking greeting card.
Now you're done have fun it's brighter than you would think maybe your parts phone will have white light LEDs