This thread takes me back a few decades when i radio controlled a 00 Lima Western. After spending many years in the rc world with 1/10 scale cars, nicads and 27mhz rc, it was a reasonably easy method to go down. These days with Lipos and miniature receivers/speed controllers it's so easy a child could do it.
What first sold it to me was the level of control you have and the smoothness of the loco over the rails, and realism is what we want, isn't it?. This old Lima Western running from a 9v PP3 battery was a joy to see, you could even see a slight resistance on the loco when it went through the points.
Recently i spent a year in the club level 1/10 radio control car scene, and now battery life is massive compared to the old days, but battery management is critical. Reading through the posts placed here, i've noticed that there is a lot of emphasis on battery balancing when charging. This is a requirement when you're after absolute peak performance from the 2S or 3S packs, but not a must do. More important is the limitation on the charging voltage the batteries are charged too, any excess here and that's the end of the battery.
Another point to be raised is the method of charging, some have mentioned trickle charging through the rail/wheel pickups, but also some have thought about using "jack plugs". NO IS THE ANSWER TO THAT IDEA, jack plugs will short the supply temporarily when they are plugged in, and the last thing a lipo battery want's to have is a direct short.
A lipo failure is an event to be witnessed, is doesn't take long, but it is entertaining or not depending on what the lipo is in. A certain item from Samsung springs to mind, the Galaxy Note.
An idea i thought of for charging, would be two small studs underneath the loco wired to the battery and a corresponding set of sprung pins/pads for the loco to ride over at a specific place on the layout or in the fiddle yard, easy and simple.
Another good point worth mentioning, is a lot of rc handsets have multiple model memories that hold the finite settings for that specific model. Some handsets will isolate each receiver when changing the model and only run the actual model selected, which gives a handset the capacity to run a large amount of trains without turning each model off. Beware, some handsets will only change the settings and leave the model functioning.
It's going to be a hard task to convert the massive community of DCC users over to rc, but they were converted from analogue once, so there is a hope.
PS, The next time your loco stops over a point or judders again, think of rc.