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.
It's important to remember that a battery does not store electricity, but. rather it stores a series of chemicals, and through a chemical process electricity is. produced. Basically, two different types of lead in an acid mixture react to produce an. electrical pressure called voltage. This electrochemical reaction changes chemical. energy to electrical energy and is the basis for all automotive batteries. This Automotive Series. 12-volt Lead Acid.