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Does anyone use constant track power to charge the batteries?
Could someone connect USAT sliders to a reverse loop detector (to insure consistent polarity) that would feed a battery charger that would charge an on board battery to the decoder/motor in the engine?
Seems a better way to run trains than to (a) worry about feeding track power throughout a large layout and (b) charging batteries without an external charger on or off the layout.
You could just pull into a station track or service track and the batteries would be charged while you wait.
Dave

Could someone connect USAT sliders to a reverse loop detector (to insure consistent polarity) that would feed a battery charger that would charge an on board battery to the decoder/motor in the engine?
Seems a better way to run trains than to (a) worry about feeding track power throughout a large layout and (b) charging batteries without an external charger on or off the layout.
You could just pull into a station track or service track and the batteries would be charged while you wait.
Dave