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AAA battery
AAA: 1.5 V alkaline cylindrical battery, 10.5 mm × 44.5 mm, about 1,150 mAh (1.7 Wh). Same battery: LR03, MN2400, E92, Micro, triple A.
1.5 Vvoltage
10.5 mmdiameter, 0.41 in
44.5 mmlong, 1.75 in
≈ 1,150 mAhcapacity
AAA: what to know
- An AAA has about 43% of the capacity of an AA, so AAA devices need fresh batteries more often.
- NiMH rechargeable AAAs are 1.2 V; most remotes and lights work fine with them, but some low-battery warnings trigger early.
AAA equivalents
LR03MN2400E92Microtriple A
- 24A: ANSI
- FR03: lithium
- HR03: NiMH
Can I use another battery instead of an AAA?
| Battery | Size | Volts | Works? | Why |
|---|---|---|---|---|
| A23 | 10.3 mm × 28.5 mm | 12 V | No | Wrong voltage: 12 V vs 1.5 V. |
| AA | 14.5 mm × 50.5 mm | 1.5 V | No | Different width: 14.5 mm vs 10.5 mm. |
What uses an AAA battery?
- Roku and most TV remotes
- Small flashlights and headlamps
- Digital thermometers and blood-pressure monitors
- Wireless mice
- Toys
Guides: Roku remote · Xfinity remote · digital bathroom scale · digital thermometer · calculator · laser pointer · blood glucose meter
NiMH rechargeable AAA (HR03) is 1.2 V and 800–1,100 mAh. Lithium AAA (FR03) lasts longer in cold and high-drain use.