amp hour

**amp hour**

An amp hour (Ah) is a unit of electric charge commonly used to describe the capacity of a battery. It represents the amount of current (in amperes) that a battery can deliver over the period of one hour. For example, a 2 Ah battery can provide 2 amps of current for one hour, or 1 amp for two hours. Understanding amp hours helps consumers compare battery performance and estimate how long a device will run before needing a recharge. This term is widely used in electronics, electric vehicles, renewable energy systems, and portable power applications.