Originally Posted by JR007

I mean, sometimes when you buy batteries, they have "gone bad" and read out as zero volts on a volt meter. It isn't common, but does happen. If a cell is reading zero volts, it's a throw away.

I use the LRP Battery Conditioner for balancing my cells. It's an individual cell balancer, that has a cut-off you can set to your own desired voltage. I use 0.9v

You can also use something like a Muchmore Zero V, but it doesn't have an automatic cut-off, so you need to maunally disconect the cells as the lamps go out or it will completely discharge.