AAA Battery Size and Voltage
AAA = 10.5 mm diameter x 44.5 mm height, 1.5 V (alkaline) or 1.2 V (Ni-MH). IEC R03/LR03, ANSI 24.
Open the interactive Standards & Sizes tool →Key facts
| Diameter x height | 10.5 x 44.5 mm |
|---|---|
| Voltage | 1.5 V (1.2 V Ni-MH) |
| IEC code | R03 / LR03 |
| ANSI code | 24 |
| Capacity | ≈ 1200 mAh (alkaline) |
Frequently asked questions
What is the size of an AAA battery?
AAA is 10.5 mm in diameter and 44.5 mm tall, rated 1.5 V (1.2 V for Ni-MH).
Is AAA smaller than AA?
Yes. AAA (10.5 x 44.5 mm) is thinner and shorter than AA (14.5 x 50.5 mm).
Related pages
AAA Battery Size is part of Standards & Sizes on GOAT Lab — a free reference you can use without signing up, and it works offline. Open the tool above for any custom value.
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