what does mah mean

mAh stands for milliampere-hour, which is a unit of electric charge that measures the amount of power a battery can hold or how long it will last before recharging. It is a measure of electrical charge that affects the output and performance of electronic devices and chargers. One milliampere-hour (mAh) is equal to one-thousandth of an ampere-hour (Ah), or 3.6 coulombs. The commonly seen milliampere-hour (mAh) is one-thousandth of an ampere-hour. The mAh rating of a battery indicates its charge capacity and how long it can run a device. The higher the mAh rating, the more energy the battery can store, and the longer the device can operate before requiring a recharge.