mAh (or milliampere hours) is the measurement used to identify how much charge capacity a battery can handle. In a more practical sense, the higher the mAh of a battery, the longer the charge will last.
Amperage, on the other hand, is the max amount of output that the battery can give. A higher amperage will have a higher power output, often creating a stronger hit when used in e-cigarettes.
Amperage and mAh are opposing factors, meaning that when one measure is higher, the other is lower. For example, a higher mAh battery will have a lower amperage level than a lower mAh battery. Thus, higher charge lifespan decreases performance level, and vice versa.
This is important to keep in mind when choosing a battery cell for your e-cigarette device. You’ll want to decide whether you prefer a stronger performance or a longer-lasting charge from your battery.