AAAA
A slim 1.5 V cell, thinner and slightly longer than an AAA. Most people meet it inside an active stylus.
- Voltage
- 1.5 V
- Chemistry
- Alkaline
- Size
- 8.3 × 42.5 mm
- Capacity
- 500–650 mAh
Specifications
| Type | Cylindrical |
|---|---|
| Chemistry | Alkaline |
| Nominal voltage | 1.5 V |
| Diameter | 8.3 mm |
| Height | 42.5 mm |
| Typical capacity | 500–650 mAh |
| Rechargeable | No |
| Also sold as | LR61, MN2500, MX2500, E96 |
Equivalent batteries
These codes describe the same physical cell as the AAAA.
Can I replace AAAA with…
Cells that fit the same space but differ in chemistry or voltage.
Alkaline, 10.5 × 44.5 mm. Different footprint — check the compartment before buying.
Check before you swap. Batteries with similar dimensions are not always interchangeable with the AAAA. Always verify voltage, chemistry and the requirements printed in your device manual before fitting a replacement.
AAAA questions
What batteries are equivalent to the AAAA?
The AAAA is sold as LR61, MN2500, MX2500. All of these describe the same 8.3 × 42.5 mm alkaline cell at 1.5 V.
Can I use a AAA instead of a AAAA?
In many low-drain devices, yes — the sizes match. Check the voltage and chemistry against your device's requirement first, because a small voltage difference can matter in calibrated equipment.
How long does a AAAA last?
A AAAA holds a typical 500–650 mAh. Real runtime depends entirely on how much current your device draws and whether it is used continuously.
Is the AAAA rechargeable?
No. The AAAA is a single-use cell and should not be recharged.
Related batteries
Other cylindricals in the index.