RE: Transmitter pack charging?
It all comes down to following the MFG instruction or not.
Both the radio and receiver battery mfg tell you to charge at 1/10 C. So what constitutes a fast charge?
I usually charge using the supplied charger but sometimes I "fast charge them at 1/4 to 1/2 C so a 10 hour charge turns into a 2-4 hour charge.
I genrally avoid the problem by carrying a fully charged extra transmitter pack and an extra receiver pack. No fast charge needed.