Discharge tests are assessments conducted to evaluate the performance and safety of batteries, particularly in devices like electric vehicles and smartphones. These tests measure how much energy a battery can deliver over time, helping to determine its efficiency and lifespan. During a discharge test, a battery is connected to a load, and its voltage and current are monitored until it reaches a predetermined cutoff point. This process provides valuable data on the battery's capacity and helps manufacturers like Tesla and Apple ensure their products meet quality standards.