300mAh

300mAh, or 300 milliampere-hours, is a unit of measurement used to describe the capacity of a battery. It indicates the amount of electric charge that a battery can store and deliver over time. The term "milliampere-hours" (mAh) is derived from the product of current (in milliamperes) and time (in hours). For example, a 300mAh battery can deliver 300 milliamperes of current for one hour, or 150 milliamperes for two hours, and so on.

The 300mAh rating is commonly used for small, portable electronic devices such as flashlights, remote controls, and low-power sensors. It is important to note that the actual runtime of a device depends on various factors, including the voltage of the battery, the power consumption of the device, and the efficiency of the battery. A higher mAh rating generally indicates a longer runtime, but it is not the only factor to consider when choosing a battery.

In recent years, the term "mAh" has become more widely recognized and used in the context of larger batteries, such as those used in smartphones and electric vehicles. However, the principles behind the measurement remain the same. The 300mAh rating is a useful metric for comparing the capacity of different batteries and for estimating the runtime of electronic devices.