What people have been noticing is new packs need to be cycled about 4 times before they will charge fully, this is both NIMH and NICD. Years ago I used to just turn on my plane and radio and operate them like I was flying until the plane control surfaces quit operating then I would charge the battery again. It seemed to work but I had no real way of telling? Didn't hurt anything. These days I cycle all my new packs several times to make sure they are up to peak power. Some wall warts take longer then just over night to charge a pack too, it isn't the charger as much as what is over night??