A battery plate is a key component inside a battery cell, serving as either a positive (cathode) or negative (anode) electrode. It is typically coated with an active material that undergoes reversible chemical reactions during the discharge and charge cycles of the battery. These reactions result in the flow of electrons, generating electrical energy. The plate's design and material composition vary depending on the type of battery, influencing its capacity, power output, and overall performance. The plate is crucial for the electrochemical processes that enable the storage and release of electrical energy in a battery.