does anyone use really big batteries?

[VintageMA]

Like the other's have said the MAXAMPS packs are junk. They may work okay for about 10 cycles, but then they may heat up or puff badly.

They are also over-rated. They are no way 20c cont. batteries. If you run them at 20C the voltage drop will be huge.

The other FP or TP or Neu cells people are referring to are 25c/50c cells meaning they can do 25c cont. and 50c burst - that's more amps than you will need.