100mAh

100mAh refers to a measurement of electrical charge capacity. The unit "mAh" stands for milliampere-hour. An ampere-hour (Ah) is a unit of electric charge, equivalent to the charge transferred by a steady electric current of one ampere for one hour. Milliampere-hour is one-thousandth of an ampere-hour. Therefore, 100mAh represents a charge capacity of 0.1Ah.

This unit is commonly used to quantify the energy storage capacity of small batteries, such as those found in portable electronics like earbuds, small remote controls, or certain types of sensors. A higher mAh rating generally indicates a battery's ability to supply a given current for a longer period. For instance, a 100mAh battery could theoretically supply a current of 100 milliamperes for one hour, or 10 milliamperes for ten hours, assuming ideal conditions and no voltage drop.

The actual operational time of a device powered by a 100mAh battery depends on its power consumption. A device that draws a constant current of 20mA would theoretically last for 5 hours (100mAh / 20mA = 5 hours). However, factors like battery age, temperature, and the device's varying power draw can affect real-world performance. It is a measure of potential rather than a guarantee of specific usage duration.