Battery or BCR for PRR S1 Proto 2 3 volt

spudderOGR Forum Member SUPPORTING MEMBERDIGITAL SUBSCRIBER

I have a friend who has a MTH PRR S1 20-3107-1 who wants to convert from battery to BCR. The engine has a battery tray made for 2 1 1/2 volt rechargeable batterys. Is a BCR a direct replacement or do you have to switch polarities because of original batteries? I've read about the need to switch polarities, but am confused as to which PS2 engines this applies to. Any help appreciated.

3/29/233:46 PM

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