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10 cells of NiMH or NiCad battteries will get your 12 volts. 10 cell packs can be purchased easily. Before you purchase a battery pack you need to know your load requirements. I assume this is a battery powered loco? (the term decoder is normally used with DCC). How much current does your loco draw? What kind of loco is it?
 

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If you are comfortable with adding cells via wiring and or soldering, then that will work. I am guessing 2100mah isn't going to produce very long run times for you (2-3 hours). I would go for 4000 mah if space is available. I'm not familiar with either of those locos or the motos, so just a guess on my part.
 

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Posted By Kenneth Milner on 08/27/2008 7:41 PM
... Where would one find out what the PMW of the decoder is? ...
Ken


Well Ken, that is what I have always found interesting about this hobby ... the lack of specifications. (Although I have to say, the Airwire manuals are top notch).
 
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