Thanks Dave. I called ProgressiveRC and the guy I spoke with emphasized this as well, although metioned FPV racing. For my purposes at the track, i will be charging 2c, 3c for the most part.

He (shoot, forgot his name, but very helpful and with great info) mentioned "rebound" as well - which i have noticed when testing a pack today... the voltage starts dropping after pulling off the charger and when the pack is ran, it rebounds up.