# item.guide
Side-by-Side Comparison Cylindrical Cells

AAA Battery vs. D Battery

Comparing 2 standards across 3 specifications. 2 key differences identified.

Comparing:
AAA Battery
D Battery
AAA Battery →

A AAA battery (IEC designation LR03, ANSI 24A) measures 10.5mm in diameter and 44.5mm in length. Alkaline AAA cells output 1.5V nominal; NiMH rechargeable AAA cells output 1.2V. Typical alkaline capacity runs roughly 800 to 1,200 mAh depending on discharge rate.

View full AAA Battery spec sheet →
D Battery →

A D battery (IEC designation LR20, ANSI 13A) measures 34.2mm in diameter and 61.5mm in length -- the largest common cylindrical primary cell. Alkaline D cells output 1.5V nominal, with typical capacity in the range of roughly 12,000 to 20,000 mAh depending on discharge rate.

View full D Battery spec sheet →

Specification Comparison Table

3 Parameters
Parameter / Spec
AAA Battery
D Battery
Diameter
10.50 mm 34.20 mm
Overall Length
44.50 mm 61.50 mm
Alkaline Voltage
1.50 V 1.50 V

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