Standard sizes · 1.5 V
AAequivalents
The AA is also sold as LR6, MN1500, 15A and Mignon. They are the same cell under different brand and standard names, so any of them fits.
Same battery, other names
- LR6
- MN1500
- 15A
- Mignon
Size and specs
- Voltage
- 1.5 V
- Size
- 14.5 × 50.5 mm
- Chemistry
- Alkaline (LR6). Also sold as lithium (FR6), NiMH rechargeable (HR6) and zinc-carbon (R6).
- Capacity
- about 2,000 to 3,000 mAh (alkaline)
- Type
- Standard sizes
What uses an AA
Typical devices and how long a fresh set usually lasts. Yours may differ.
| Device | Takes | Lasts |
|---|---|---|
| CO detector | 2 × AA | about a year |
| Wireless mouse | 1 × AA | about 6 months |
| Game controller | 2 × AA | about 2 months |
| Thermostat | 2 × AA | about a year |
| Radiator valve | 2 × AA | about 2 years |
| Security camera | 2 × AA | about 2 years |
| Weather sensor | 2 × AA | about a year |
| Wall clock | 1 × AA | about a year |
| Blood pressure monitor | 4 × AA | about a year |
| Flashlight | 2 × AA | about a year |
| Kids' toy | 3 × AA | about 3 months |
AA vs AAA and 18650
Batteries people mix up with the AA. Close, but not the same.
| Battery | Size, voltage | Difference |
|---|---|---|
| AA | 14.5 × 50.5 mm1.5 V | This page. |
| AAA | 10.5 × 44.5 mm1.5 V | Thinner and shorter (10.5 × 44.5 mm). Same 1.5 V, but it won't make contact in an AA slot. |
| 18650 | 18.4 × 65 mm3.6 V | Similar in shape but bigger, and 3.6 V. It will damage a device made for AA. |
Good to know
- LR6 is the IEC name, MN1500 is Duracell's, 15A is the ANSI code and Mignon is the German name. All are the same AA.
- Lithium AA cells (FR6) fit too and last much longer in high-drain devices like cameras and game controllers. They're a good choice in the cold.
- NiMH rechargeables run at 1.2 V instead of 1.5 V. Most devices don't mind, but some show "low battery" earlier than you'd expect.
- Change every cell in a device at once, and don't mix brands, ages or chemistries. A weak cell gets reverse-charged by the others and can leak.
Questions
What is the equivalent of an AA battery?
The AA is also sold as LR6, MN1500, 15A and Mignon. They are the same cell under different brand and standard names, so any of them fits.
What size is an AA battery?
14.5 × 50.5 mm, 1.5 V. Alkaline (LR6). Also sold as lithium (FR6), NiMH rechargeable (HR6) and zinc-carbon (R6).
What uses an AA battery?
Common devices include co detector, wireless mouse, game controller, thermostat, radiator valve, security camera, weather sensor, wall clock, blood pressure monitor, flashlight and kids' toy.
Battery Inventory for iPhone and iPad
Never look up the AA again.
Battery Inventory remembers which battery every device in your home takes, reminds you when one is due, and counts the spares in your drawer, so you buy the right cell before the old one dies. The finder in the app knows every code on this page. Search any of them, or point the camera at a coin cell to read it.
- Battery change reminders, free
- Monthly smoke and CO alarm test reminders
- A spares drawer and shopping list
- Cordless tool packs and chargers too
No account needed. Smoke and CO alarm features are reminders only: the app can't see or test your alarms.
