Re:Oxyride
Actually the nickel/oxy has no increased overal capacity-ESP. when used at lower level currents. So, if the battery is not being used for demanding things like DigiCams, the moderate extra cost would be mostly wasted. Of course, where a little extra voltage (1.7) is desirable, there could be an advantage.
OTOH, /ubbthreads/images/graemlins/grin.gif -this Oxy cell is noticeably heavier in weight, and offers no improvement in cold temperature performance, than a cheaper alkaline.