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learningaboutelectronics.com/Articles/mAH-of-a-battery.php

mAH Specification of a Battery- Explained. ... Being that the mAH is the battery's life in terms of current capacity, the more mAH's means the longer a battery can last, or the more current it can supply in a circuit. So batteries with higher mAH's are more desirable, because they can last for a longer period of time, since they have a higher ...

www.quora.com/What-does-mAh-say-3-000-mAh-mean-in-a-battery

The symbol "mAh"—note the capitalization—means "milliampere hour." This is a unit of electric charge, and it's the most common way to express the capacity of small batteries. (Bigger batteries are labeled in ampere hours; 1 Ah = 1000 mAh.) You can...

michaelbluejay.com/batteries/rechargeable.html

An example of a battery that doesn't work well in high-drain devices is a standard alkaline (though there are premium alkalines like Duracell Ultra that work fine in cameras, except they can't be recharged). Capacity. AA capacities range from 1200 to 2700 mAh.

en.wikipedia.org/wiki/Ampere-hour

An ampere hour or amp hour (symbol A⋅h; also denoted as Ah or A h) is a unit of electric charge, having dimensions of electric current multiplied by time, equal to the charge transferred by a steady current of one ampere flowing for one hour, or 3600 coulombs. The commonly seen milliampere hour (mA⋅h or mAh) is one-thousandth of an ampere hour (3.6 coulombs).

batteryspecialists.com/mah.htm

Milliamp Hour (mAh) Milliamps Hour (mAh) is important because it's the easiest way to distinguish the strength or capacity of a battery. The higher the mAh, the longer the battery will last. Batteries with different mAh ratings are interchangeable. If your battery is rechargeable then the mAh rating is how long the battery will last per charge.

web.mit.edu/evt/summary_battery_specifications.pdf

A Guide to Understanding Battery Specifications MIT Electric Vehicle Team, December 2008 A battery is a device that converts chemical energy into electrical energy and vice versa. This summary provides an introduction to the terminology used to describe, classify, and compare batteries for hybrid, plug-in hybrid, and electric vehicles.

www.youtube.com/watch?v=6nfVn8-7WDM

What the heck is an amp hour and why are there so many sizes of batteries? If anyone has wondered what Ah means or what is the difference between 20 hr and 10 hr, this video will attempt to explain.

www.cnet.com/how-to/all-about-laptop-batteries-updated

Laptops All about laptop batteries: Updated. Ever wondered why your laptop's battery doesn't last longer? We explain the technology behind battery power, and provide tips on how to maximise it.

www.powerbankguide.com/powerbank-capacity-explained

We expect to charge our 2000 mAH battery smartphone 5 times using a 10000 mAH powerbank as 2000 x 5 =10000. However, in reality, your phone battery will get charged about 3 times!! A quick rule of thumb is to assume that the real world capacity of your powerbank is 2/3 of the theoretical capacity mentioned on the package.