Need an ID on this tiny flashlight.

[jusval]

Hello,
I have this really small flashlight or keychain light that I found in a box of "stuff". I have no idea what it is. The biggest problem is what kind of battery it might use. I thought an AAA but as you can see in the photos, an AAA isn't it. I'm not farmilliar enough with some of the others. I think there's some short batteries, shorter than AAA but I don't know which ones.

EDIT: From the measurements even an AAAA would be too long. Seems to be just about 36mm room for length and 10mm for diameter. I thought of A23, but it's 12v and the 122 bulb is 1.2V. I'm lost on this one.

I thought one of you might know or even have one yourself. If you know anything, I would sure appreciate the heads up.

Thanks,
Justin

 

[Flying Turtle]

Don't know the light, but it looks like a CR2 battery might fit.

Geoff

 

[flashburn72]

wow thats a neat little light. Are you sure a cr2 will fit in that. a 12v cr23 battery will. I looked at pics of a cr2 battery and they look just like a 123 battery. Forgive my ignorance if I am wrong flying turtle.

 

[jusval]

Read my edit above. Sorry, I should have put all that in the first post. It's a 1.2v bulb so it's got to be a 1.2v battery. I think it would?

EDIT Again: From what I can figuer out with possible combinations, the spring goes over the threads on the bulb. It sticks out a little past the bulb + terminal that way and would stop a battery from touching the + terminal till you pushed the button on top. So, when I lay that out, it would mean about 30mm of room to fit in. That's with the spring uncompressed. With the spring compressed a little it's about 32mm.

So a battery about 32mm tall and no more than 10mm diameter?

I must be missing something, since there's nothing close to that. Maybe a spacer is missing. That would let one of those flat style camera/watch batteries work. That would be 1.5v

 

[Lynx_Arc]

that looks like a stardard screw in type bulb if you could find a 3v battery that would fit you could put in a 222 bulb and use it instead.

 

[Illum]

I think an N sized cell might fit, look up UM-5

they are 1.5V, I have a clock that uses that sort of cells.



heres the ANSI dimsensions

 

[Lynx_Arc]

I think an N sized cell might fit, look up UM-5

they are 1.5V, I have a clock that uses that sort of cells.

I thought of an N cell but it looked too tight a fit at a glance. IMO I would consider modding it for LED

 

[flashburn72]

Jusval, thats what I meant was a23.sorry for any confusion.

 

[foxtrot29]

Ha! It looks like something I can't say on this family based forum.

 

[flashburn72]

I googled 112 bulb and it came back as a e10 base bulb. after a few searches I found many sites that carry this bulb in many sizes. I think you are right when you thought watch battery. garrity even makes a bulb like this for a aa flashlight.

 

[Illum]

heh, if you want to that could certainly be a possibility...

find yourself a PR4401 transistor and an appropriate inductor and you get this
http://www.customlightfactory.com/phpbb3/viewtopic.php?f=16&t=420



the inductor is the only other component needed and its inductance
determines the current output

more info here

 

[jusval]

I think an N sized cell might fit, look up UM-5

they are 1.5V, I have a clock that uses that sort of cells.



http://imageshack.us

Actually I had an N cell. 12mm is to large a diameter.

 

[lctorana]

Single N cell.

 

[flashburn72]

just go buy one of those cheap laser pointer swap the batteries to your light.
Are you sure its a 1.2 bulb. cuz the 112 e10 base bulb which looks just like that is a 1.5 bulb.

 

[Morelite]

Might be a 2/3AAA (10.5mm x 30mm), here is a NiMH one.
A lot of cordless phones use these in a group of 3 in series wrapped with shrink wrap.

 

[jusval]

Might be a 2/3AAA (10.5mm x 30mm), here is a NiMH one.
A lot of cordless phones use these in a group of 3 in series wrapped with shrink wrap.

I do believe that would work! I will have to try it.