Is there a battery in the flash wheel of the skateboard?
Yes, there are!There are some things that use button batteries to flash lights.Another is to use the wheel's rotation to generate electricity to make the light brighter. (mostly like the manual lighting generator on the market)
Because it is possible that the core is broken in the glide, the wheel does not light, so that a magnetic core can be replaced so that it can continue to shine.
The flash wheel is frictional and luminous. The principle is that the inner core and the metal on the inner wall of the wheel rub and shine, and the friction of the new wheel is bright, and it can not always shine
