30000mAh

30000mAh refers to a specific capacity measurement for batteries, particularly common in portable power banks. The 'mAh' stands for milliampere-hour, a unit of electric charge. It indicates how much current a battery can deliver over a period of time. A 30000mAh battery can, for example, theoretically deliver 30000 milliamperes (mA) for one hour, or 300mA for 100 hours, and so on.

This capacity is significantly higher than what is found in typical smartphone batteries, which usually range from 3000mAh to 5000mAh. Therefore, a 30000mAh power bank can charge multiple devices multiple times or a single device many times before needing to be recharged itself. For instance, it could charge a typical smartphone around 5 to 6 times.

The primary advantage of a 30000mAh battery or power bank is its extended power reserve, making it suitable for extended travel, camping trips, or situations where access to electrical outlets is limited. However, larger capacity also generally means a larger physical size and weight for the power bank. Charging a 30000mAh power bank itself can also take a considerable amount of time, depending on the charger used. When considering a 30000mAh battery, users should also be aware of safety certifications and the quality of the internal components to ensure reliable and safe operation.