But as if being a mine detector isn't dangerous enough, the poor animals can overheat in hot climates.
True, but we know that what happens to these batteries when they overheat is extremely complex.
"to make too hot" (transitive), late 14c., from over- + heat (v.). Intransitive sense "to become too hot" is from 1902, originally in reference to motor engines. Related: Overheated; overheating.