charge capacity

Charge capacity, often measured in milliamp-hours (mAh) or watt-hours (Wh), indicates how much energy a battery can store and supply over time. Think of it as the amount of "fuel" in the battery, determining how long a device, like a phone or laptop, can operate before needing to recharge. A higher capacity means longer usage between charges, assuming the device's power consumption remains the same. It helps compare different batteries and their ability to power devices, but actual runtime can also depend on how the device uses energy.