What is typically used to measure the performance of batteries?

The performance of batteries is most commonly measured in ampere-hours (Ah), which quantifies the battery's capacity to deliver a certain amount of electric current over a specific period. Ampere-hours indicate how much charge a battery can store and how long it can provide current at a specified discharge rate. This metric is crucial for evaluating the battery's overall energy capacity and is widely used in comparing different battery types and technologies.

While voltage is also an important measurement for batteries, indicating the potential difference and helping determine how much energy is available, it does not directly provide insight into how long the battery can sustain a load at a given current, which is crucial for performance evaluation. Temperature, while it can affect battery performance and lifespan, is not a direct measure of capacity. Pressure is not relevant in standard battery performance assessments. Thus, ampere-hours remains the standard for measuring battery performance, as it directly relates to energy storage and delivery capabilities.