Hi there,
apparently this is not known to many people so I thought I would tell you about the advanced charging dock.
Event though it was listed with 30 days shipping time it came with the mavic 3 days after my order.
Essentially the adv. charging hub plugs into the 100W Phantom 4 charger and charges your batteries roughly 2x as fast (not quite, but close).
4 Batteries in 2h30min(instead of 4h30min).
To achieve this it has a fan which emits a high pitched whirring.

So far I really like it, the total cost of the "quick charge" solution here in the EU is about 120 Euros.
I have two batteries total and can be ready to fly in as little as 70 minutes.

Just a quick hint that there is another option instead of buying loads of batteries.

Cheers

Samuel

Unless you are out on the field and dont want to wait yo charge your battery's or do not have access to an outlet / power. Also I do have 4 battery's already and will be getting the charging hub soon! Quick charge and lots of flying time!