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NO WIRE TO TRACKS  A very good thread recently done on Battery Power.  It also references Lithium Polymer batteries used in Model Air Planes.   (2) pages on the Electrical Forum. 

A lot of important information about current battery technology and safety issues.   

Here's a link to the Large Scale Central's,  Power & Sound sub-forum.

I'm certain that if you peruse it, you'll find many options for going over to battery power .

http://www.largescalecentral.c...ms/5/power-and-sound

I'm strictly analog track power myself, but it is nice to know what's available  if sometime in the future I want to convert one of my L.S. Locomotives over to battery power & RC control.

Dave

Thanks folks. I will look further into it but a rough estimate I saw on one of the links posted would be about $100 for all the loco electronics and about another 100 bucks for the RC remote/controller. 

I'll keep poking around to get more accurate numbers. 

Rayman is an excellent source for MTH One Gauge.

I have converted my MTH One Gauge Big Boy and VO1000 to battery with tiu in box car.

Very happy with run times and DCS range.

Alan