Most helpful positive review
22 of 22 people found the following review helpful
Excellent for Pentax k100d
on February 10, 2010
When I was still using Nimh batteries in my Pentax k100d camera, I was constantly switching out the batteries. The camera would shut off as the voltage dropped slightly, even though there was still plenty power available. Plus I was constantly buying new sets, as the problem gets worse as the set is used- even though there were very few recharge cycles used. That was because the camera needs minimum 1.2 volts to function. Well, Nimh is only rated at 1.2 volts. Unless new AND fully recharged, your not going to get that full 1.2 volts that are needed.It was the main thing pushing me to upgrade to a new camera that would use the more expensive lithiums.
However,thanks to the high 1.6 voltage on these Nizn batteries, I've been going on seemingly forever with one set. Plus my flash gun recycles way quicker (note: due to the quicker recycle time the flash can overheat if repeatedly cycled on full power without a break - do a web search). It's even been measured when fully charged to reach over 1.8 volts.
Note that the amount of recharges you can get will probably be less then with Nimh. Maybe more in line with Ni-cad. However, I don't see myself using that up for quite some time. Also note that you can't use a non-Nizn battery charger, so you'll need to buy a new PowerGenix charger as well.
A fantastic buy!