Charging A123 M1 Cells?

[BrianG]

OK, thanks. It makes sense now. The cutoff is easily done with the FET, I just couldn't understand how it would do the CV stage.

You think that the CV stage is good for only 10% of the charge? When the pack reaches 4.2v, the current is still at the full charge current, but then slowly falls. I would think that's at least 15-20% of the charge. For instance, with my 2s2p emoli, I get about 4500-4800mAh when it hits the CV stage and I end up with a total of ~5800mAh put into the cell. That's at least 17% of the charge missing if I were to pull the pack off at that point. Unless emolis act different than M1's or Lipos?

Even if it was only 10% due to the lack of the CV stage, that's 10% less pack capacity. I don't know if I'd like that. I understand the cost factor, but the price of these packs, sometimes it's worth getting the "good stuff".