 This is about my attempts to use battery power for powering HO scale models. This is the controller for remote control of locomotives, direction switch, on-off switch, and a knob to control speed. This particular locomotive is a hybrid of a GE44 Tunner made by Bachman with the shell from an RDC box cap. The controller controls lights on-off for the power for the controller, direction, locomotive, and speed. Powered by a 9-volt battery with a transmitter inside. Here we go. This is not quite but close to top speed for this particular version. You can control zero to the max speed, which is about what it's going at now. You can control the lights, which are directional. We go reverse, the reverse light will come on and it will back up. You'll notice there's no flickering whatsoever. Even when we go through the frog, there's no hesitation through the locomotive, and it's just smoothed the silk as it goes through. To prove that there's no power on the track and it's completely battery, you can see that the shorting jumper is there. Right across the tracks, we'll slow it down now and approach it, but there's no power right now in the tracks. When there is power, we'll go and recharge, and here's the power inside. Now it's laid out. We take whatever power is on the track, rectify it, feed a battery, maintain our manager, which feeds a LiPo battery, lithium polymer battery, with the DC to DC up converter to increase the voltage and regulate it constantly. And then we control it remotely with the set of drivers actually powering the motors. Notice here, as well as we did with the other one, we're removing the magnets which control the read switches, magnetic read switches, which disable the battery so that we don't have to constantly recharge the battery. And it prolongs battery life, I hope, a little bit too. Now we're going around my infamous test track, and this particular locomotive has a different internal electronics arrangement. The up converter in this locomotive will actually go up above 12 volts, and it's adjustable, and it's actually only driving one motor. One of the trucks has its motor completely replaced, taken out. Again, it has the same kinds of controls. You'll also notice that the caboose is lit interior and with its markers by battery power as well. There's no flickering at all, no matter where it is on the layout. It's not deriving any power from the rails. You can see the jumper still across the rails there. And the read switches, as I said before, enable or disable the battery internal to it. Both of these, all three of these models, when there is power on the rail, will take the power in any form, DCC, DC, even if it was AC, how you do that, I don't know, but if it was AC or DC or DCC, it'll take the power and use that power to recharge the battery that's inside the unit. So it's completely self-contained, and when there's no power on the rails, as there is no power right now in this demonstration, it is the only thing powering the locomotives. Now we'll stop it and slow into the connectors, give you an idea of the low-speed control you can get with it, very smooth, very nice. Hope you enjoyed it and have fun.