I am trying to determine if DJI has a travel/transportation certificate for the Drone Batteries ? (Profoto has one for the B1 Batteries). With airlines restricting types of batteries, it would be nice if DJI had one.

There is no restriction applied to the Mavic batteries since they are all under 100Wh. Tighter restrictions start to apply as soon you go beyond the 100Wh per battery.

AACY is right , normally, there is no restriction applied to the batteries which are under 100Wh. I would recommend you contact the airline company to confirm it first, figure out what certifications they require if they need the certifications, then send email about this to support.us@dji.com, see if we have those certifications. We have the MSDS for batteries.