2xAAA sized 3.7V batteries?

[Soulero]

Hey guys, I know some of you use 10440 + a spacer with your 2xAAA pen lasers, but I was wondering if there was a larger sized 3.7V battery out there that was either the size of 2 AAA's or really anything longer than a AAA with the same diameter, rechargeable of course.

 

[Livinloud]

What would happen if you put 2x 10440 in a 2x AAA laser pen. Om guessing the.laser would die but have tried it or anyone for that matter?

To answer yoir question I think the 10440 is the only option. I havent come across ant others

 

[Zeebit]

For it to work without a spacer you would need a 10880 cell but it does not exist. I made a spacer using some solid copper wires by stripping a length of it and winding it around a pen.

 

[djQUAN]

I made a 2x 10440 in parallel using an idea posted somewhere around here (sorry, couldn't find the original thread - credit goes to the originator).

Soldering to a Li-Ion cell is not for the faint of heart though.

edit: I got the idea from here: (8th post) http://laserpointerforums.com/f52/review-5mw-405nm-violet-purple-blue-beam-laser-pen-56789.html

 

[Soulero]

I made a 2x 10440 in parallel using an idea posted somewhere around here (sorry, couldn't find the original thread - credit goes to the originator).

Soldering to a Li-Ion cell is not for the faint of heart though.

That would work if it wasn't ~8 volts... That would likely kill a laser designed to run at 3V. Someone needs to invent the 10880, seriously.

 

[djQUAN]

It's in parallel. An insulating disc and copper tape wires the two cells in parallel resulting in 3.7V at twice the capacity of a single cell.

I've used it in a couple pen lasers without trouble but you do so at your own risk.

 

[Zeebit]

That's very clever. I will have to try that. You'll just have to be careful in soldering Li-ion cells. I was careful no to overheat the cell when I soldered a nub on the positive end of my 18650

 

[djQUAN]

yes, heat degrades a Li-Ion cell capacity. I used a temp controlled iron and quick passes to minimize the damage.

 

[Soulero]

It's in parallel. An insulating disc and copper tape wires the two cells in parallel resulting in 3.7V at twice the capacity of a single cell.

I've used it in a couple pen lasers without trouble but you do so at your own risk.

I have a really high powered solder gun, plus I don't have any 10440's on hand... Would you be willing to sell one to me? If so, how much would you charge?

 

[djQUAN]

I have a few extra but don't have paypal. You might be able to find someone that can do it for you who is nearer (less shipping too)

edit: you should also have a way to charge the battery as I don't know any that can accept a full length "10880" cell. I use a USB li-ion charger circuit with magnetic contacts attached.