outdoor electric trains NOT battery rf controlled

[nachoman]

When I was a teenager, I had an idea to put NiCad rechargeable batteries in locomotive tenders or dummy diesel units to serve as a backup to propel a train across a dirty section of track. The train would operate as any other train, it's just that the batteries would charge when electrical contact was good, and only provide assistance when the track was dirty. I never tried building anything because I decided it was better to try and keep the tracks clean .