Yes, really. Chinese batteries for toys doesn’t move it out of the dud category.
Compared to the thousands of breathless research articles over the years, it isn’t much.
Big Battery Bike Build - Testing The EESD [Made with graphene]
https://www.youtube.com/watch?v=P266pdT71tI
Robert has a lot more videos about graphene on his youtube channel. He also has developed and ran tests of graphene composite materials that do a good job of stopping rifle bullets that might be of interest.