Battery Glossary -mAh (Milliampere-hour)

When you purchase a power bank, you check the numbers like 5,000mAh and 10,000mAh for its capacity. You may know a higher number indicates a larger capacity, but may not know what the mAh means exactly. Today, we will learn what it means to help you purchase the right battery you need.

What is mAh?

The mAh is a shorthand for “milli Ampere hour.” The letter “m (milli)” refers to one-thousandth and accordingly, 1,000mAh equals 1Ah, the quantity of electricity produced when a current of an ampere flows for one hour. So, mAh is the unit of the quantity of current that can be used for an hour. It is normally used to indicate the capacity of power banks or batteries of electronic devices.

What We Can Learn from mAh?

The mAh indicates how long we can use our electronic device and its power consumption with the stated capacity. For example, if an electronic device with the battery capacity of 3,000mAh is capable of playing a video as long as for 10 hours, we can guess that the device consumes 300mA an hour for playing a video.

How Many Times Can a Power Bank Charge a Smartphone?

How many times a power bank with a 10,000mAh capacity and a voltage of 3.7V can charge a smartphone? The chargeable capacity may vary depending on temperature, the resistance of the USB, voltage and usage status of the device. However, if the battery of the smartphone has the same 3,000mAh capacity and 3.7V, the number is more or less 3.

As most people use smartphones today, checking the battery capacity of the device you use has become important. Next time you find mAh on a battery, you will know whether it is what you are looking for.

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