How to use an AAA battery instead of button cells in laser?

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james761
4.99mW Green Laser Toy

Joined: 15 Feb 2008
Posts: 2

Posted: 2/15/08, 12:07 PM Post subject: How to use

Hi im new to this forum but i really want to know if i can use an aaa battery instead of 3 buton cells. I have one of those really crappy pens about 6cms long or so. Is there a way i can do this? thanks for ur time.

Astro
55mW Advanced Wicked Laser

Joined: 12 Feb 2008
Posts: 64

Posted: 2/15/08, 4:04 PM Post subject:

Well if it fits it will work. But it will be 1/3 as bright. The voltage of one AAA as well as almost all batteries bar 9 volt have a current of 1.2-1.8 V. More voltage means more output. One AA battery voltage at best is 1.8v(with lithiums) 3 button cells of worst quality would output around 3.6V . So best case scenario a AA would be half of the worst case scenario with button cells. So basically your answer is no. Technically you could but shouldnt

james761
4.99mW Green Laser Toy

Joined: 15 Feb 2008
Posts: 2

Posted: 2/16/08, 5:54 AM Post subject:

thanks for the info

staminanerd
Fusion Laser

Joined: 12 May 2007
Posts: 270
Movie(s): 3
Location: Monte Carlo

Posted: 2/20/08, 8:18 AM Post subject:

You can use paper to insulate the internal area from the springs, and connect two wires, one of which goes to the spring and the other one to the internal surface like this : http://www.instructables.com/id/Alternative-powering-system--lithium-b atteries-fo/ I still need to update it though.

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