Martin,
Tom Moore who is a test engineer for medical and military battery
packs wrote recently on a RC web site that the chief reason NiMh false
peak is the wrong charge rate. They should be charged at close to 1C
or the peak may not be detected. He also mentions that they should
never be left on trickle charge for an extended time and that trickle
charge as a regular charging method will eventually destroy them.

I have had good luck with Sanyo Eneloops 2000 mAh.

John