The packs I see consistantly cause crashes are big Nimh packs.

These packs are particularly prone to false peaks. Add that with occasional use, low tech chargers, low tech users, long storage periods between plane useage and a history of simple reliable trouble free use of Nicds equals disaster waiting to happen.

I have and use these large packs all the time, but, I have learned to watch them very carefully.

Of note: I think that the new Low Self Discharge (LSD) Nimh technology may bring simplicty to these large, cheap, and enviormently friendly Nimh batteries.

Just another two cents worth on the subject.

Ken