I hate to tell you this but I had pretty bad luck with those same packs. They got pretty hot charging them at 1C which is bad for NiMH batteries. 5 Amps would be out of the question IMO.

In addition, they have a pretty high internal resistance and pretty steep voltage drop off while discharging. If your motor is marginal, you may see reduced flight times. In fact, with these packs and an AF motor in my Corona, I could only manage 2-3 minute flights. They were okay with the stock Fusion motor though.

Good luck!