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FrozenGate by Avery

Question for the battery mavens?

B

Bicyclops

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I extracted a 5mw diode from a laser pointer powered by 3 LR44 1.5 volt button cells at 150 mAh. Could I power this using 3 standard serial AA batteries 1.5 volt at 1800 mAh and what would happen to the power of the laser at the higher amperage. Do I run the risk of burning out the diode? WOuld I get more output. Do I need to heat sink it?
 





Yes, nothing, not really, no and probably not :p

Those crappy keychain red lasers usually just use a resistor for current limiting. If you used more than 3 standard batteries you'd risk burning it out.
 
mAh and mA are two different things. You could run that "chip" laser off a car battery if you limit the Ld current to its design parameters.
HMike
 
Yeah, as long as you stick to the same voltage, high mAh will just let it run longer.
 
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