I already also heard, that the batteries are a bit more than 1.5V, maybe 1.6V or 1.7V. A new "1.5V"-battery I measured had a bit more than1.6Volts. That means that 1.6V*3=4.8V should be definitely still in the acceptable range for the laserpointer. Most of them are from China and hence don't have a manual with technical parameters.
I recall last year in the camera forums, people were shouting about using the new NiZn batteries because it sped up their flash recharge times, and then about 6 months later reality set in, when it became apparent that some/all flashes weren't prepared for the higher voltage. And if you mentioned using NiZn batteries, manufacturers might not honor warranties (http://strobist.blogspot.com/2011/01/nizn-batteries-long-term-update.html).
Please enter a valid email to subscribe
We need to confirm your email address.
To complete the subscription, please click the link in the
email we just sent you.
Thank you for subscribing!
via Egeo 16