The only time you need to cycle a NiMh is to check for capacity. Check out www.rcbatteryclinic.com for some good advice on the care of you batteries. To get the most out of either NiMh or NiCad, you need to form charge them. This is a charge at 0.1C for 16 hours. It may take two or three cycles of this to bring them up to max capacity. Discharge between charges at 0.25C down to anywwhere from 0.9 to 1.1 volts per cell, use the 0.9 figure if you are comparing results to factory specs. If you use 1.1 volts/cell you will get a lower mah number than when using 0.9 volts/cell. Note that charging at 0.1C is defined as a slow charge, not trickle charging. It often helps to do a slow charge for 16 hours on both NiCad and NiMh batteries that have been dormant for a time or have had a few fast charges put on them to bring them back up to a higher capacity.