Don't cycle NiMh batteries. Cycling was for NiCd technology. NiMh don't need to be cycled. Periodically measure the capacity of your pack by discharging it on some known load. You can buy a discharge measuring device or you can just measure using your loaded voltmeter. Let's say when the battery is new you can fly 6 flights of 10 minutes each before you loaded voltmeter show 4.6 volts. After 5 or 6 years of use, you note that you can only go 4 flights before the same voltmeter reads 4.6 volts. Your pack has lost some capacity and should be replaced.