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Reply to "What current rating is needed on a Nimh 9 volt battery used in MTH PS-1 engines?"

150 to 180ma is sufficient.  Anything above is gravy.  Now, I have run into a few no name batteries that seem to have too high a no load voltage rating and they do not allow the engine to come out of reset.  So use a reputable battery if you go that route.  G

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