Store your batteries safely when travelling on a plane, car etc or when at home. 

The bags are designed to limit the damage that a malfunctioning battery cell can do.

Although the latest DJI smart batteries are safe and unlikely to malfunction, nothing is perfect.

I have used these in the past when travelling by plane, it gives me more confidence when going through security knowing that if they ask about my large battery collection I can at least show that I have done what I can to keep them safe.

If travelling with your batteries, make sure you have discharged them to their safe level of roughly 75%. 

(The level they go down to after the time specified in the app settings)