What is a AAAA battery equivalent to?

The AAAA is interchangeable with: LR61, MN2500, MX2500, 25A. These share the same size and voltage.

What voltage is a AAAA battery?

A AAAA is 1.5V, measuring 8.3 × 42.5 mm.

Active styluses (Surface Pen), laser pointers, slim penlights.

AAAA

1.5V · 8.3 × 42.5 mm · Alkaline

The AAAA is rarely stocked but powers many active pens and slim gadgets.

Battery type	AAAA
Voltage	1.5V
Size	8.3 × 42.5 mm
Chemistry	Alkaline
Equivalents	LR61, MN2500, MX2500, 25A
Common uses	Active styluses (Surface Pen), laser pointers, slim penlights.

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💡 In a pinch, a 9V battery contains six AAAA-style cells inside — but buy proper ones.

What is a AAAA battery equivalent to?: The AAAA is interchangeable with: LR61, MN2500, MX2500, 25A. These share the same size and voltage.
What voltage is a AAAA battery?: A AAAA is 1.5V, measuring 8.3 × 42.5 mm.
What is a AAAA battery used for?: Active styluses (Surface Pen), laser pointers, slim penlights.