Interesting find. Was flying yesterday with a TP 1320 pack I've had for 2 seasons and suddenly started loosing power. Landed the Axe and looked at my timer. I still had about 3 minutes left counting down from 11 minutes. Changed packs and flew 2 more packs the full 11 minutes.

Once home, I CAREFULLY checked each cell using a multi-meter. The two outer cells showed 3.38 volts each. The inner cell showed 3.28 volts. There's a 0.1 volt difference from cell to cell.

I have a balancer from E-sky, but haven't used it yet cause I don't have the necessary connectors. Ordered what I hope will work through CommonsenceRc.com.

Anyone else have the same problem?

Here's the big ???. Checked the pack a few days ago and can't remember if I charged it first then checked it, or checked it and "forgot'' to charge. [:'(]

Well, it WAS balanced at one time.