Not Trains! Shock Horror - My Other Love Slot Cars

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Ahhh..that USB port is for Power...I thought it may have been for re-charging 🤔

I see where you're coming from, but to get batteries in these micro-cars as well as the motor, LED's, etc... would be a major achievement.  Besides its better to not have run time dictated by small on-board batteries in my opinion, also one less thing to go wrong