Battery capacity refers to the maximum amount of electrical charge that a battery can store. It is typically measured in milliamp-hours (mAh) or amp-hours (Ah). The higher the battery capacity, the longer the battery will last on a single charge.
Checking battery capacity is important for several reasons. First, it can help you determine how long your battery will last on a single charge. This information can be helpful when you are planning to be away from an electrical outlet for an extended period of time. Second, checking battery capacity can help you identify problems with your battery. If your battery is not holding a charge as well as it used to, it may be time to replace it.