One of the major reasons that proper battery disposal and battery recycling is essential is that, it contains toxic heavy metals. These metals could have been Nickel Cadmium, Alkaline, Mercury, Nickel Metal Hydride and Lead Acid.
As these metals are needed in helping your battery to perform, its desired function could seep into the soil and even water sources that will cause certain contamination, once it is improperly disposed. With such, you might contribute in the underlying pollutions like the pollution tot lakes as well as streams, leakage from the landfills, environmental exposure into the heavy metals, burns and even physical danger and more.