Here is a video of an experiment where I run a motor with 2 aaa bats and recharge 2 other aaa bats at the same time. I give meter reading and amp test, enjoy. http://www.youtube.com/watch?v=UUmbI_-4gn4 (http://www.youtube.com/watch?v=UUmbI_-4gn4)
I was trying something similar a while back except I don't believe I had the diode or cap in there. I'm trying to remember if you had posted something similar before with 3 AA's charging 2 AA's through a motor? Might have been someone else but I was trying it with car batteries through a 12 volt motor and had some interesting results using 2 on 1 or 24 volt pulses to a 12 volt battery.
Yep I posted something as such,,while back,,always trying new ways to make such work better.. Posted this one cause it seemed to work better..Back then on those older post I did not have the battery checker that did the amp test,,only way I could know such worked was retry the charged batteries running something else,,which worked well..But I like my newer designs and experiments a bit more,,got the meter now that puts the batteries under a load amp test,,good for checking if the batteries took on a charge,,how much and so on..This newer design works quite well actually,,longer you leave it running the other two batteries recharge more and more, Ive still got this experiment running,,started yesterday,,but the 2 bats Im recharging I made sure were fully drained and pos and neg crossed to completely drain them,,I usually do that.. They are already recharged,,and were when I made the video,,they are even more recharged now however, at dcv 2v setting now at 1.382 they were at 1.370 I think when I made the video and even then the battery tester meter said they were recharged,,in the green, I just left it running is all Im saying,,and they still charging up even more,,motor still turning..So guess you leave them recharging for like 14 hours get a good recharge,,leave them recharging longer this way get even better recharge..