Finally, I can individually my old NiMH batteries GP or revive in groups that could be loaded in pairs in the supplied battery charger and then also there were very hot. You now have all the different versions to capacity by the pairs Laden. One can not do more with the new CM 420 from old batteries, which must be clear, however, for each battery's max. Capacity rausholen. My old GP 2000 mAh (about 10 years old) had all after charging in original charger supplied a Kpazität of about 500-700 mAh, after a dip with the batch manager 420 overnight after all again from 1060 to 1150 mAh.