Used to own a Plp and replaced the stock cadmium battery packs with the radio shack rechargable NMH batteries which were just as good and much less expensive. Also the NMH batteries don't have a "memory" like the cadmium batteries so they don't need to be periodically run down and recharged like the cadmium ones. Always ran the NMH batteries with the charger plugged into ac power with fine results. The people at nagra said that NMH batteries would work just fine, and they did just perfectly for me.
