I have considered that Dixieland. When I check my batteries right after charging with the H9 charger, the 6v reads 6.6v. I don't believe the Accu-cycle obtained this number. If I remember correctly, it was close, at 6.5v most of the time. That's with a loaded H9 tester.

I understand that if the voltage is lower, you'll have less "energy" to work with but it seemed (again, I've not documented all this stuff) that the batteries lasted longer and dropped voltage slower, when charged on the H9 Double vision charger. Is there something to "packing in the voltage tighter" to get a few more points on the voltage? I'm sure that there are those who can explain the situation at nauseum, but that's not me... all I know is that I feel I get more flight time. That's really all we're looking for in a battery anyway. If it weren't for me noticing a difference when I first went to the other charger, and noticing the same difference in reverse, when I went back to the first charger, I would think it were not true. But, I had no bias when going to the fancier charger and, in fact, had high hopes for that charger.