The milliampere hour (mAh) is a unit of electrical charge that is commonly used to measure battery capacity. It is often described as the size of a battery's “fuel tank,” as it measures the total amount of energy that the battery can supply on a full charge. In general, batteries with larger mAh ratings will last longer than those with smaller ratings, assuming that the two are subjected to the same patterns of usage. <br />On this page you'll see battery 'fuel tanks' ranging from 2600 mAh to 15,000 mAh.
