My layout is still wired for track power using a 15A ham radio 13.8V supply tweaked to put out about 15V. I have the Aristo Train Engineer being fed by this supply and enjoyed good range over my entire layout even though the TE receiver was in the basement below grade.
I started experimenting with battery power and trail cars using an Aristo TE and an 18V drill battery in an open gondola. This ugly set-up visited several railroads and was capable of powering a consist of 3 locos, but due to the folding of the antennae, range was very poor.
I purchased a Spectrum DX5e system for my live steam engine when they first came out. Range was exceptional and no glitching. When the receivers came way down in price, I bought a bunch. A year ago I did my first stand-alone battery conversion using the Spektrum RX, a G Scale Graphics RailBoss and LiIon batteries in a Bachman Porter.
I was so happy with the results with the LiIon/Rail Boss/Spektrum in the porter that I retired my drill battery/TE trail car and converted my sound car to be both sound and R/C for my 1:29 trains. I’m presently building a similar trail car for my 1:20.3 trains which will also feature LiIon batteries, Spektrum reciever and a new RailBoss Plus board.
BTW - with the exception of a short test on my indoor track of locos being sold , an electron has not flowed through my track in over two years.
I can’t afford to put battery & R/C and sound in all my locos. That’s why I chose the trail car route. So far, it works for me. And since i’m pretty firmly committed to the RailBoss, I should probably think about selling some of my TE’s.