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How tall is an AA battery?

AA battery · Energizer E91 alkaline AA (IEC LR6)

Overall height
49.5–50.5 mm 1.95–1.99 in range
Diameter
13.5–14.5 mm 0.531–0.571 in range
Weight
≈ 23 g 0.051 lb approx.
Volume
≈ 8.1 cm³ 0.27 US fl oz approx.
Show
Honeybee, US penny, AA battery, Human drawn to the same scaleHoneybee: length (worker) 10–15 mm. US penny: diameter 19.05 mm. AA battery: overall height 49.5–50.5 mm. Human: height 1.61–1.75 m.Honeybee: 10–15 mmUS penny: 19.05 mmAA battery: 49.5–50.5 mmHuman: 1.61–1.75 mHuman1.61–1.75 mAA battery49.5–50.5 mmUS penny19.05 mmHoneybee10–15 mm
Everything is drawn to the same scale, standing on the same ground line. Silhouettes are simplified outlines scaled to the measured dimension. A faded outline shows the top of a size range.

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Dimensions

MeasurementMetricImperialNotesSource
Overall height 49.5–50.5 mm 1.95–1.99 in Industry standard dimension limits, 49.50 (1.949 in) to 50.50 mm (1.988 in). Range: varies [1]
Diameter 13.5–14.5 mm 0.531–0.571 in Industry standard dimension limits, 13.50 (0.531 in) to 14.50 mm (0.571 in). Range: varies [1]
Weight ≈ 23 g ≈ 0.051 lb Typical weight of an Energizer E91 (0.8 oz). Approximate [1]
Volume ≈ 8.1 cm³ ≈ 0.27 US fl oz Typical volume of an Energizer E91 (0.5 cubic inch). Approximate [1]

About the AA battery

The AA is a common cylindrical battery size, designated LR6 by the IEC and 15A by ANSI in its alkaline form. Energizer's datasheet for its E91 alkaline AA gives industry-standard dimensions of 49.50 to 50.50 mm tall and 13.50 to 14.50 mm across. A typical cell weighs 23.0 g and delivers a nominal 1.5 volts.

  • The E91 uses a zinc-manganese dioxide alkaline chemistry with a nominal voltage of 1.5 volts. [1]
  • Energizer rates the E91's shelf life at 10 years at 21 °C. [1]

How many fit?

  • ≈ 34 × AA battery · overall height lined up end to end match the Human · height
  • ≈ 3,600 × AA battery · weight on the scales weigh as much as Human · body mass
  • ≈ 2.6 × US penny · diameter lined up end to end match the AA battery · overall height
  • ≈ 9.2 × US penny · weight on the scales weigh as much as AA battery · weight

Counts divide one sourced figure by another. "End to end" uses each object's main measurement; weight and volume rows appear only when both figures are sourced.

How it compares

  • 2.6× An AA battery is about 2.6 times as tall as a US penny is wide. See side by side
  • 1.2× An AA battery is about 1.2 times as tall as a golf ball is wide. See side by side
  • 1/1.3 A tennis ball is about 1.3 times as wide as an AA battery is tall. See side by side
  • 1/2.4 A soda can is about 2.4 times as tall as an AA battery. See side by side
  • 1/3.8 A pencil is about 3.8 times as long as an AA battery is tall. See side by side
  • 1/34 An average adult is about 34 times as tall as an AA battery. See side by side

Factors compare the overall height of an AA battery with each object’s own main measurement (height for a human). Where a size varies, the factor is given as a range.

Notes on these figures

  • Weight and volume are for the Energizer E91 alkaline cell only; other brands and chemistries were not checked.
  • Height and diameter are the minimum and maximum limits shown on the datasheet's industry-standard dimension drawing.

Sources

  1. Energizer, Energizer E91 AA Product Datasheet (Form No. E91NA1018). Accessed 25 September 2026.

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