I have never heard of 1.5 volt NiMH AA batteries.
I can find no mention of such a battery on the Internet.
You may be thinking of seeing DC1500 printed on the battery, but that does not indicate 1.5 volt.
DC1500 appears to be a model number.
Duracell no longer makes a 30 minute charger but they do have a 15 minute charger.
Those quick charge devices require you to use a battery that has a pressure release vent.
Quick charging creates lots of heat and the vent is a safety device.
The Duracell DC1500 does have such a vent.
When I purchased my camera a few years ago I bought a Duracell Rechargeable Accu 30-minute charger and 1.5v NiMH AA batteries. They worked great (quick charge, long life, ability to charge odd numbers) but the cells have finally died and I'm looking for new ones. I cannot find Accu rechargeables anywhere. I can find all manner of 1.2v NiMH cells, but nothing in 1.5v that says it will work with my charger.
What should I be looking for? The charger says that its output is 1.4v/1.7a per slot. I appreciate any advice.