At the heart of every EnerSys IroncladŽ battery is our exclusive technology, called the Ironclad Effect. When compared to conventional flat plate or round tube batteries, the Ironclad "square tube" positive plate design provides greater surface area for holding active material and exposing it to electrolyte. The result is a chemical reaction that provides more power over longer periods of time and higher voltages under load. This unique construction delivers the power you need to maximize production on every shift...every day.