I am putting up some remote cameras on a mesh.  They will have a 12350 SLA battery charged by solar.  The battery says not to put in an airtight enclosure.  They are obviously not refering to out gassing.  Is it for temperature?  I have it wrapped in 1" insulation board and will be in a water tight box.  I could add some vents but hesitate as this will be in the woods and lots of stuff can get through small screens.

Kirk N6SXR