When alkaline batteries get old enough, they leak, whether they are in a "high temperature environment" or not.
They should not leak within a year or two. My frame of reference is longer due to my age. It would take many years for a battery to leak. But given that everything made today is crap, maybe it is possible for alkaline batteries to leak earlier than they used to.
All the more reason to avoid alkaline batteries. Just make sure you get the right kind of Lithium.
