I personally recommend to use black 12V engines and hook it to your train transformer controlpanels, put down a som train tracks under it and let it be a part of your 12V train landscape.
I you intend to use 4.5V system note that the cables and batteryboxes is up to you. They are not included in the inventory. Use what you have instead of me saying that you should use a batteryrod or box of a certain color.
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