[MetroMPG]

The automated charge/discharge cycling feature of this charger is a big benefit here.

You set it to run each stick (subpack) through a number of full cycles and it records the amp-hour capacity of each stick for later viewing.

Multiple cycles on each of the 20 sticks is a time consumnig process. Apparently it takes something like a week or two to fully examine the pack in this way to identify the bad/weak sticks. Doing it "manually" would be a marathon!

I haven't yet read up on grid-charging to equalize the pack, though I know some owners are grid charging.