Zippy Lipo question

No. It's RIGHT at the upper limit of the cells max capacity. Overcharging is bad stuff.

I figured out that my charger is way off in monitoring voltage. I tried the hidden service menu calibration, but no success. I can't correct it enough to match voltage for most of my packs (just one).

I just sent the charger back today. You all may want to check your charger's accuracy (compare voltage of your lipo with a voltmeter vs. the charger's readout). There's a mod you can do to also make the balancer far more accurate, but it involves surface mount resistors (and voids warranty IIRC). Soooo, I said eff it and just sent it back. I'll live with my Vision Peak Ultra for a while even if it takes a while to charge my 3s 4300; at least I know it reads the right voltage.