I did a google search "rechargeable battery size". I came up with this:
http://www.frontierpc.com/product/En...r/NH50BP2.html
There is a fair size ad, which I quote part of: Energizer D Size Nickel Metal
Hydride Rechargeable Battery, 2200 mAh. The Battery package (2ea.)
shows 2500 mAh. They are available in Canada as per the ad.
I would think a company in the U.S.A. would also carry something
similiar. Any rechargeable batteries I have used show a voltage of 1.25
and checked with a digital meter after an over night charge reaches 1.37
to 1.39 volt, not 1.50 like the normal battery. I do not use rechargeable
batteries in my cameras (Wild View EZ-Cam) as they have the 12 volt
external port.
Hope this helps.