This rechargeable flashlight was built using free material. It is very powerful it uses 23 LEDs and 2 lithium ion used laptop batteries.
high power LEDs
Wires (i used 22 gauge)
2 lithium ion used laptop batteries
Step 1: Building It
Start by soldering all the LEDs on the small board.
I cut the top off the bottle to focus the light. I taped aluminum foil to the outside of the pop bottle to focus the light. I Secured the board in the pop bottle by poking holes and threading wires through them and twisting them together on the outside.
I cut some thin cardboard and taped it around the batteries. I then paper mâchéd this box. I cut a hole for the switch. I then paper mached the bottle cap. I stuck it in the housing.
I then screwed the pop top into the housing. I put the wires through a hole I made in the pop bottle.
Step 2: Wiring
I soldered the LEDs, switch and 2 batteries together. The batteries were connected in parallel. I soldered the wire before the switch and left it exposed, I covered all other wire joints with shrink tubing.
Step 3: Using the Flashlight
The light is very powerful and lights up an entire room.
Step 4: Charging
It is easy to connect alligator clips to the + and -. You can check the voltage of the batteries and charge them without opening up the flashlight.