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Canonical battery record · checked 2 September 2026

PR44 / size 675

PR44 / size 675 is an air-activated zinc-air family. Colour tabs are a shopping aid, not proof of compatibility.

PR44675PR675AC675
Answer

PR44, 675, PR675, AC675 are the supported exact aliases for one 11.6 × 5.4 mm zinc-air button cell. No other family is treated as an automatic replacement.

Top profile · Ø 11.6 mm
Side profile · 5.4 mm high
Original proportional profiles. Scale is consistent within this diagram; screen size is not a physical ruler.
Format
Zinc-air button cell
Dimensions
11.6 × 5.4 mm
Voltage
1.4 V nominal
Chemistry
Zinc-air
Drain context
Air-activated; performance depends on activation and use
Rechargeable?
No — primary cell; do not recharge.
Capacity context
Product- and test-specific; consult a current manufacturer datasheet.
Confidence
High

Equivalence and confusion matrix

Code or familyClassificationReason
PR44 · 675 · PR675 · AC675Exact equivalentThese evidence-backed markings resolve to this one canonical record and share its cited physical and electrical specification.
LR44 / A76 / AG13Same size, different electrical familyThe 11.6 × 5.4 mm envelope matches, but the electrical families do not: Zinc-air at 1.4 V nominal versus Alkaline manganese dioxide / zinc at 1.5 V nominal. Physical fit is not equivalence.
SR44SW / 303Same size, different electrical familyThe 11.6 × 5.4 mm envelope matches, but the electrical families do not: Zinc-air at 1.4 V nominal versus Silver oxide / zinc at 1.55 V nominal. Physical fit is not equivalence.
SR44W / 357Same size, different electrical familyThe 11.6 × 5.4 mm envelope matches, but the electrical families do not: Zinc-air at 1.4 V nominal versus Silver oxide / zinc at 1.55 V nominal. Physical fit is not equivalence.
LR43 / AG12Not equivalentThe physical envelopes differ (11.6 × 5.4 mm versus 11.6 × 4.2 mm). Do not force, stack or infer equivalence from a shared diameter or code pattern.

Supported application context

  • Hearing aids specifying this size

Application context is limited to the scope stated in Energizer size 675 Product Datasheet; it is not a device compatibility claim.

This is an air-activated hearing-aid size. Confirm the numeric or PR marking before removing the tab; tab colour alone is not a technical identifier.

PR44/size 675 shares 11.6 × 5.4 mm dimensions with LR44, SR44SW and SR44W, yet it is air-activated zinc-air at 1.4 V nominal. The 675 or PR44 marking must remain visible.

What the code means

PR44 is the IEC-style zinc-air identity; the numbered size and AC/PR forms are evidence-backed names for the same physical family.

Discharge and drain behaviour

Removing the tab admits air and starts activation. Delay after activation, airflow, temperature and use pattern can materially change service life.

Capacity context: Product- and test-specific; consult a current manufacturer datasheet.

Substitution guidance

Use the exact supported size specified by the hearing device. Colour tabs help identify a size but are not, by themselves, proof of equivalence.

Fact-level evidence

Energizer size 675 Product Datasheet

Published by Energizer; page 1, specifications and industry-standard dimensions drawing. Checked 2 September 2026. Independently presented facts only; publisher wording, layout and diagrams are not reproduced.

Corroborated against Energizer Battery Cross Reference Guide; page 3, size PR44 / size 675 row in the hearing-aid battery table.

Open primary source Open corroborating source
Not a device-fit guarantee.

Confirm the exact code, chemistry and drain requirement with the device maker. Keep button and coin cells away from children and never recharge this primary cell.