Godox VING VB-18 battery

I’m loading up my shopping cart with lots of Godox goodies thanks to inkista’s suggestion in a different thread.

How are these VB-18s charged? Inside the Speedlite? Is there a stand alone charger? Is there a charger with multiple bays? I love my Canon 1d charger that will charge two batteries, it would be super nice if Godox had something similar... especially since I’m gonna have at least 5 of these 860s plus spare batteries.

Thanks again for any help

EDIT: I see the stand alone VC-18 charger but would still be interested in a multi-bay charger if there is one. If not, I might make one myself

Follow up question... I’m reading reports of slow recycle times with the Li batteries. Is this common? Or a small copy-specific problem?

A google search seems to indicate that a multiple bay charger probably doesn't exist. But I see the charger price is not exorbitant so I'd just buy the needed quantity and rely on a power strip.

I don't have much comment on battery life except to say that the life improves with use and repeated charge/discharge cycles. I remember buying a 3rd party batterly for one of my DSLR's and almost returning it becuase the life was so poor. But after about four charge/discharge cycles it was the equal of the Canon battery, if not better.