Where can I purchase a battery for a hover1 Cruze skateboard

The best thing to do is this, first, get the model number, usually you can find the model number it was packaged in, of the box, or some place where the battery sits in, I wouldn't be too sure but should be easy to find. Once you find that, go on ebay or amazon, in the search bar type this “(model number) battery replacement" that should give you what you're looking for. I hope this helped.