Picked up 8 Powergenix AAs and the quick charger. My several year old low self-discharge NiMH AAs (Maha Imedion) still run my R-09s for ~5+ hours, but will not run the DR2d for more than a few minutes. Figuring that deck may not like the lower voltage of NiMH, I'm trying these.
The nickel-zincs charge very, very fast. Initial tests in the DR2d battery hog ran it for about 2.5 hrs, recording in dual channel mode (2 stereo tracks) which is the only way I use that recorder. I ran it a bit on vacation and think they may have started getting more time after some cycling, but I'll have to test that. BTW, if looking at the Powergenix, the quick charger (white) is the better choice, primarily becasue it has independent circuits for each battery as well as charging faster without penalty. It's only a few dollars more than the 3-5 hr rapid charger (black) which only has 2 circuits instead of 4, charging the batteries in pairs.