An interior door does not have to withstand extreme weather changes. Interior and exterior doors are not the same product sold under different labels. The construction of each is different, with exterior doors given special treatment to stand up to the elements and frequent use.
The charging of lead-acid batteries can be hazardous. However, many workers may not see it that way since it is such a common activity in many workplaces. The two primary risks are from hydrogen gas formed when the battery is being charged and the sulfuric acid in the battery fluid.
The charging system/battery warning light is one of the most critical warning lights on any vehicle. Whenever this light goes on, it means that the vehicle is running solely on battery power and will only be able to drive a very limited distance before it runs out of electrical power and dies.