I have been watching battery technology for decades, and the Graphene battery has moved from the lab, to the manufacturing line! It has a higher watt density than the LiIon battery, charges Much faster, will not self ignite, and uses no expensive rare earth elements in it's chemistry.
It can be manufactured in a LiIon battery plant, as the technology begins to take up the market. It has 3 times as much power as the LiIon, which has had the higest power storage for a decade.