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The lead–acid battery was invented in 1859 by French physicist Gaston Planté and is the oldest type of rechargeable battery. Despite having a very low energy-to-weight ratio and a low energy-to-volume ratio, its ability to supply high surge currents means that the cells have a relatively large power-to-weight ratio. These features, along with their low cost, makes it attractive for use in motor vehicles to provide the high current required by automobile starter motors.
As they are inexpensive compared to newer technologies, lead-acid batteries are widely used even when surge current is not important and other designs could provide higher energy densities. Large-format lead-acid designs are widely used for storage in backup power supplies in cell phone towers, high-availability settings like hospitals, and stand-alone power systems. For these roles, modified versions of the standard cell may be used to improve storage times and reduce maintenance requirements. Gel-cells and absorbed glass-mat batteries are common in these roles, collectively known as VRLA (valve-regulated lead-acid) batteries.
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Extra Heavy Duty “Battleship” Construction for Lifetime Durability. Strong Hold® heavy duty cabinets have superior strength with all welded 12 gauge steel that provides maximum protection. These storage cabinets have a padlockable 3 point latching system and 4″ hinges with brass hinge pins for security. 14 gauge steel shelves adjust at 2″ increments. Heavy duty cabinets feature long lasting dark gray electrostatic enamel finish. These industrial storage cabinets have 7 gauge, 6″H steel legs that allow floor anchoring for stability. Shipped fully assembled and ready to use.
Solid Front Cabinets have dual doors that swing open 180° and include cast bronze handles.
Double Shift Cabinets provide two separate storage compartments.
Maintenance Cabinets store mops, brooms and cleaners.