amount of power that a battery can deliver per unit of volume or mass, providing an indication of how quickly a battery can be charged or discharged

NOTE 1 Power density of a battery is typically measured in watts per unit volume or mass, e.g. watts per kilogram.

NOTE 2 High power density in batteries is desirable for applications that require rapid charging and discharging.

NOTE 3 Power density is distinct from energy density, which is more relevant for applications that prioritize energy capacity over the rate of energy delivery.

NOTE 4 Battery power density is a measure of how quickly a battery can deliver or absorb energy per unit of volume or mass, while C rate is a measure of the rate of charging or discharging relative to a battery’s capacity. Both concepts are important in assessing different aspects of battery performance, and they can be considered together to evaluate the overall capabilities of a battery in specific applications.