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A moist concrete floor combined with the carbon in the battery cases could create electrical current between the cells, discharging them. None of this is a problem with modern batteries — safe in their hard plastic shells. In fact, concrete is generally an excellent surface on which to place a battery bank.
In respect to this, can batteries be stored on concrete?
So, it's OK to set or store your battery on concrete.” Encased in steel, an Edison cell battery placed directly on a concrete floor would discharge more quickly than normal. A subsequent innovation, encasing the battery in hard rubber, also had its drawbacks, as rubber is both made of carbon and a bit porous.
In respect to this, why is it bad to put a car battery on concrete?
This means that if they were left on concrete or cement floors, the moisture from the floor could cause the wooden box to wrap, allowing the glass cells to shift and break. Of course, the battery acid would leak all over the floor and the battery would be rendered useless.
Well this myth is false. Concrete does not kill a battery. The real reason a battery dies is from sitting. A battery can be drained whether it is sitting on concrete, wood, metal or any other surface.