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

AAAA vs. D Battery

Comparing 2 standards across 6 specifications. 6 key differences identified.

Comparing:
AAAA
D Battery
AAAA →

A AAAA battery (IEC designation LR8D425) is a 1.5V Alkaline cell measuring approximately 8.3mm in diameter and 42.5mm in length -- smaller than a AAA. It's used in devices with especially tight internal space, such as laser pointers, some styluses, and compact LED penlights.

View full AAAA 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

6 Parameters
Parameter / Spec
AAAA
D Battery
Diameter
8.30 mm 34.20 mm
Overall Length
42.50 mm 61.50 mm
Nominal Operating Voltage
1.50 V —
Chemistry
Alkaline —
Nominal Capacity (at 10mA)
~625 mAh —
Alkaline Voltage
— 1.50 V

Other Alternatives to Compare

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