On Sat, 16 Nov 2013 22:40:22 -0500, "Mike Marlow"
wrote:

woodchucker wrote:

What Leon was referring to is balancing technology. Which makes sure
each cell is in range, and not deviating from the others.
That is actually where most of the problems are, especially with low
end chargers. The better chargers will monitor each cell rather than
the pack and if one cell gets higher than the other it will deplete
it while bringing the others up. If they are too far out it shuts
down.

How do you monitor an idividual cell when they are connected in series?

You put a chip across each cell, often in the pack.