What happens if you recharge NiMH batteries in a NiCad charger? What exactly is the difference in the way they need to be recharged? The first set of NiMH batteries I got, from Radio Shack at least 1 1/2 years ago, have been charged only in a NiCad charger. They seem to work fine, giving around 3 times the life of a standard AA NiCad. I purchased an Eveready charger, that has a switch for NiCad/NiMH. Now that I'm getting more and more of the NiMH AA batteries, (Rayovac 1600 mAH AA's from Walmart; $11/4PK +tax)I'll need to get 1 or 2 more chargers. (Probably for AAA/AA only) But I wonder what I may have done to the set of NiMH I've been rechargeing in the NiCad charger.