![](/static/253f0d9b/assets/icons/icon-96x96.png)
![](https://beehaw.org/pictrs/image/c0e83ceb-b7e5-41b4-9b76-bfd152dd8d00.png)
It works for now, but the reason most wires have a rubber-like insulator around them is that it takes very little to Crack or abrade a thin coating such as this and turn it into a fire hazard.
I’m surprised a product with such a small safety margin is allowed for sale.
Ditch the batteries and just spin up a large flywheel.