Hello,

I have had my Mavic packed up in my case for a week or so.  In prepping for an afternoon flight, I opened up the case pulled out the spare (not connected to Mavic) batteries to put them on the charger just to make sure they were fully charge.  In pulling them out, one of the was really warm.  The two others were normal.  Doesnt seem good that an unplugged battery just sitting in the case would get warm.  Anyone have any thoughts?

Thanks

It was warm because it was going through it's pre-programmed discharge, this is normal. The default setting for discharge is 10 days, you can adjust this in DJI Go.

Ahhh. That makes senseI guess  and thats about how long its been sitting in the bag (still winter here).  Guess I should read through the owners manual one more time ;)  Thanks Airobotix.

Here is a video tutorial of battery maintenance for your reference.