Author Options:

LASER pointer keychain Question ??? Answered

I'm taking apart my laser pointer keychain, I want to run it off of normal batteries like a 9v or AA. What would be equivalent to the 3 1.5v cell batteries?


Else a resistor will probably do the job, but 9v cells usualy have very low capacity compared to three AA(A)-Batteries.

Voltage wise, 3 X 1.5 = 4.5 Since AA and AAA bateries both are 1.5 v a piece, that will not be a problem. It comes down to the Amperage rating of the cell batteries. After that is known, we can compare the AA rating.....but the 9 v. is a bit high without a regulator between it and the device.