 Watt-hour per kilogram

Watt-hour per kilogram (Wh/kg) is a unit of measurement used to express the energy density of a material or battery in relation to its mass. It indicates how much energy (in watt-hours) can be stored or provided by one kilogram of the substance or battery. This metric is particularly important in fields like battery technology, where it helps to evaluate the efficiency and performance of energy storage systems.