I personnally use the BW 4000 case :
https://www.lacameraembarquee.fr/solutions-de-transport-dji-mavic-2/8146-3633-valise-bw-4000-pour-mavic-2-smart-controller-4031541739865.html#/64-couleur-jaune
Ther's a place for the battery charger so you can charge with the batteries and charger staying...