By Battery Capacity

Battery capacity refers to the amount of energy a battery can store, typically measured in milliampere-hours (mAh) or watt-hours (Wh). It indicates how long a device can operate before the battery needs recharging. Higher capacity generally means longer usage time for electronic devices like smartphones, laptops, or power banks.

For example:

• A 3000mAh smartphone battery may last for a day with moderate use.
• A power bank with a 20,000mAh capacity can charge multiple devices multiple times.

Battery capacity also depends on the device’s energy consumption, so two devices with the same capacity can have different runtimes depending on their power requirements.