Laser Batteries

[VegasSteve777]

Hello Laser Fans

I'm using Duracell's 1000 mAh rechargers, and with the new 200mW I recently bought, with the batteries in a "Not fully charged state", the laser light goes from full brightness, to about 30% after about 2 minutes of constant "On the button" use..... I placed a fresh set of plain Jane Alkaline batteries in and it didn't happen, but instead after a long period of time on the button, the light progressivley went dimmer and dimmer......

I was under the assumption that these fine batteries didn't perform in that matter, but instead would lose there charge and completley stop operating the device in use....

Is this common, and are there any batteries that would perform better??

I've used Titaniums, Lithiums and Alkalines.......Thusfar, the 1000 mAh's are the best, but was surprised to see that the power so suddenly dropped off that way, and not simply shutting off the light totally....

As I said, I was under the impression that these batteries didn't do this, but instead would operate at full power until the device shut off totally, not going instantly dim in the fashion my laser has done...

Any insight would be more than appreciated!!

Thanks~~

Steve

 

[Aseras]

rechargeables slowly loose more and more of their capacity. the smaller batteries also loose it faster. AAA's will go really quickly, you'll loose about 50% of the oroginal capacity after a hunderd or so recharges.

rechargeables also are a lower voltage, 1.2 vs alkalines 1.5, so as that capacity drops, the voltage start to suffer sooner too. nimh are usally better than alky's in high drain sustained power, lithiums are the best, basically a flat line from full charge to barely dead and then the voltage drops to nothing. It could be that your laser just need a higher voltage than the strained nimh's can handle.

 

[chimo]

Is your laser rated for that long of a duty cycle?

In 2 minutes the Laser Diode will get quite warm. They are much more sensitive to heat than normal diodes. The duty cycle for laser pointers that gets brought up most often here seems to be 60 sec on and 10 seconds off - I don't know if that applies to your laser.

Paul