This type of homopolar motor can be made in an infinite number of configurations, proportions and dimensions. Lithium batteries are perhaps too powerful and tend to melt the copper wire if it is too thin, I suggest you try with normal rechargeable batteries.
These are the magnets I used for this video, thank you supermagnete.com for giving them to me for free
Rod magnet 5x25mm: https://sumag.net/s-05-25-n-x02
Steel Balls 10mm: https://sumag.net/st-k-10-n-x01
Big Rod Magnets https://sumag.net/s-10-40-n-x01
Steel Balls 20mm https://sumag.net/st-k-20-n-x01
Coppery Disk http://sumag.net/s-15-08-k-x01
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Magnetic Sculpture becomes a Homopolar Motor | Magnetic Games
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