The mAh of an AA battery is not a single fixed number; it depends entirely on the battery's chemistry and the specific test conditions used. Official documentation from major manufacturers shows a documented range of 1,900 mAh to 3,075 mAh for common AA battery types, meaning the answer to "aa battery mah" always requires specifying which battery and how it was tested.
What is the mAh of an AA battery?
There is no universal mAh value for an AA battery because "AA" defines only the battery's physical size, not its internal chemistry. The same AA-sized battery can be alkaline, nickel-metal hydride (NiMH), lithium, or zinc-carbon, and each chemistry stores a different amount of charge. Official manufacturer pages document Panasonic eneloop NiMH rechargeable AA cells at a minimum of 1,900 mAh, Panasonic eneloop pro NiMH AA cells at a minimum of 2,500 mAh, and Procell alkaline AA batteries at a nominal 3,075 mAh under a specific test. The capacity you actually get depends on which battery you buy and how you use it.
Understanding mAh and why conditions matter
Milliamp-hours (mAh) is a unit of electrical charge that measures a battery's energy capacity. However, a mAh rating is only meaningful when the discharge current and cut-off voltage are stated alongside it. For example, Procell documents its alkaline AA battery at 3,075 mAh only when discharged continuously at 25 mA down to a 0.8 V cut-off. If you draw more current or stop at a higher voltage, the measured capacity will be lower. Without knowing the test conditions, comparing mAh numbers from different batteries is not an exact comparison.
Documented AA battery mAh ratings by brand and chemistry
| Brand | AA type | Documented capacity | Conditions |
|---|---|---|---|
| Panasonic eneloop | NiMH rechargeable | min. 1,900 mAh | As listed on Panasonic's lineup page |
| Panasonic eneloop pro | NiMH rechargeable | min. 2,500 mAh / 2,450 mAh | As listed on Panasonic's lineup page |
| Procell Alkaline AA | Alkaline | 3,075 mAh | 25 mA continuous discharge, 0.8 V cut-off |
These three examples illustrate that AA batteries from different brands and chemistries have substantially different documented capacities. The table also shows that the test conditions, especially the discharge rate and cut-off voltage, are critical to understanding what a given mAh number actually means.
Why AA batteries show different mAh ratings
Three main factors cause AA batteries to display different mAh ratings. First, battery chemistry changes the capacity: NiMH rechargeable cells typically have lower capacities than premium alkaline cells, while lithium AA cells can offer different trade-offs. Second, the discharge rate matters: a battery tested at a low, steady current will show a higher mAh number than the same battery tested at a high current draw. Third, each manufacturer uses its own test methods, including different cut-off voltages and discharge profiles, so two batteries with the same chemistry can still show different ratings. The exact mAh figure must always be taken from the specific battery's datasheet, not assumed from the size alone.
Frequently Asked Questions
How many mAh is a standard AA battery?
There is no single standard value. Official manufacturer pages document AA batteries at 1,900 mAh minimum, 2,500 mAh minimum, and 3,075 mAh nominal, depending on brand and chemistry.
Why do AA battery mAh ratings differ so much?
Because chemistry and test conditions differ. Alkaline, NiMH, and lithium AA batteries have different inherent capacities, and even within the same chemistry, the discharge current and cut-off voltage used in testing change the measured mAh number.
Is a higher mAh AA battery always better?
Not necessarily. For a low-drain device like a remote control, a high-capacity alkaline AA may last longer than a NiMH rechargeable, but for a high-drain device like a digital camera, the NiMH's lower internal resistance may deliver more usable power despite a lower mAh number.
What does mAh mean for my device's runtime?
mAh tells you the total charge the battery can deliver, but actual runtime also depends on how much current your device draws.
Can I use the mAh rating to compare AA and AAA batteries?
You can compare mAh numbers between AA and AAA batteries, but only if you also consider the different test conditions and chemistries. For detailed comparisons of AA and AAA battery specs, refer to the official datasheets for each battery type. The AA and AAA battery specifications are documented separately because the smaller AAA size typically has less capacity than an AA of the same chemistry.
How do I find the mAh rating of my phone's battery?
On an iPhone 15 or later, go to Settings > Battery > Battery Health. On iPhone 14 or earlier, go to Settings > Battery > Battery Health & Charging. The battery health screen shows the maximum capacity as a percentage, not a mAh number, but the original mAh rating is listed in the device's technical specifications.
