Regarding the issue of battery types, yesterday I had something interesting happen. I was using one of our 5 cordless phones that we purchased in 2010. They all have nickel metal hydride batteries in them. A pair of AAA in each phone. They've never been replaced. Not once. Yesterday, for the first time, one of the phones gave me a warning that it was out of juice and it went dead. As of this morning, it appears to be back to fully charged. It makes me wonder why/how these batteries have lasted for 13 years and never needed replacing. All the same type batteries on my Makita drill went bad within 2 years of purchase. I'd love to hear why. Anybody?