I doubt you will be able to find an MSDS specific to the Mavic battery. If you need one, you may be able to look up the MSDS for just a Lithium-Polymere battery since that's what the batteries are made of.
We had to get one to ship batteries for a shoot and our dealer was able to get it to us. Believe that was for Inspire 1 batteries about a year ago. I'd say check with your dealer. I guess ours has it because they use them for shipping to international customers.