Instructables

Convert your Laser Pointer to use AAA batteries

Picture of Convert your Laser Pointer to use AAA batteries
Laser Pointers are great entertainment for cats, but those pesky LR44 batteries don't last long. After my cats revolted because I forgot to buy batteries, I decided there had to be a better way! A bit of time tinkering, and I came up with this fairly easy way to use AAA (triple A) batteries instead of the LR44s. This probably only works for pointers that use the LR44.
 
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Step 1:

Picture of
Parts and pieces. (Bits and bobs)

A laser pointer that used LR44 batteries.
3 AAA batteries.
at least 4 1/2 inches of 1/2 CPVC pipe
6 inches of 14 gauge wire


Useful things.

Needle nose pliers
Tubing cutter
Ruler
Marking pen

Step 2:

First, cut a length of 1/2 inch CPVC pipe a bit over 4 1/2 inches long. 4 and 5/8 worked for me, but I don't think it's all that critical. It is important that the pipe is CPVC. PVC will not work! The inside diameter must be such that the batteries and wire fit snug.

Then bend an "S" on the end of the 6 inches of 14 gauge wire. Once again, 14 gauge was critical, as 12 would not fit, and 16 was too loose. I am remodeling my house, so I used a piece of ground wire. Magnet wire would work well, but don't forget to sand off the insulation where it touches the battery terminal, and where it touches the inside of the case of the pointer.

Then, put a battery with the bump end (+) touching the "S" of the wire, and slide this into the pipe.

Step 3:

Put the other two batteries in the pipe from the opposite side. Make sure the batteries are all facing the same direction!
With the "S" flush with the end of the pipe, there should be 1 (one) inch of the Negative side of the battery protruding, and about 1/2 (half) inch of wire.
Why does everyone always have to steal my ideas? Nice build, though.

First person to get the idea into Instructables wins, James! Or the first to patent an idea (Tom Pearce: first to invent powered flight. Wright Brothers: first to patent it. :] )

I think your comment is a bit late, lol.
SIRJAMES093 years ago
as I had said earlier, cpvc pipe & the 14 gauge wire is sold per 12 inches only.
SIRJAMES093 years ago
many, if not most hardware stores will sell it by the foot. so if you only need 4.5 inches, you will still have to buy 12 inches....but here's the bright side; the stuff is cheap! cheap meaning low cost.

same thing with the wire.

it sells by the foot
emopants925 years ago
So has anyone figured out where to get CPVC pipe without buying an unneeded amount?
check mine out here
Anton19955 years ago
wow thank you I was thinking to make something like that for long time.Now I now how.Yay 5stars and favorite.