What is a ZA5 battery?

ZA5 is a zinc-air hearing aid cell sold as size 5 (red tab / IEC PR63). It is rarer than size 10 and not interchangeable with ZA10. Only use size 5 when the empty pack or audiologist specifies it — see the hearing-aid size hub.

What is ZA5 also called?

ZA5 pack labels and aliases on this site include PR63, 5, 5A, AC5, VT5, 7012ZD, PR521. These are names for the same battery entity — not chemistry substitutes.

Battery

ZA5

1.4V zinc-air button cell

5 is a pack label for ZA5 — same battery, different name on the package.

Chemistry: zinc_air
Voltage: 1.4 V
Diameter: 5.8 mm
Thickness: 2.15 mm
Used by: 0 devices

Common uses: Hearing aids (legacy CIC)

Common questions

What is a ZA5 battery?: ZA5 is a zinc-air hearing aid cell sold as size 5 (red tab / IEC PR63). It is rarer than size 10 and not interchangeable with ZA10. Only use size 5 when the empty pack or audiologist specifies it — see the hearing-aid size hub.
What is ZA5 also called?: ZA5 pack labels and aliases on this site include PR63, 5, 5A, AC5, VT5, 7012ZD, PR521. These are names for the same battery entity — not chemistry substitutes.

Other names

Genuine aliases and pack labels for this battery — not substitutes of a different chemistry.

PR63 · 5 · 5A · AC5 · VT5 · 7012ZD · PR521

Related codes

Commonly confused with

ZA5ZA10

Not a substitute

Both zinc-air; size 5 ≠ size 10

Size family

Edge thickness in the 5.8 mm family — thicker bar means thicker cell. Not to scale. Highlighted cell is this page.

1.25 mm

1.65 mm

2.15 mm

2.15 mm

2.7 mm

3.6 mm

Devices using ZA5

No devices listed for this battery yet.

Learn more

Testers & chargers

Optional tools that fit this cell type — only where the chemistry allows. Separate from the battery answer.

Amazon links may earn us a commission. They do not change the battery answer.

Coin cell / button cell battery tester
Quick check of CR / LR / SR button and coin cells before fitting
Buy on Amazon More tools
ZTS Mini-MBT Multi-Battery Tester
More informative state-of-charge style checks across common formats
Docs Buy on Amazon More tools
BT-168D-class digital battery tester
Budget household go/no-go checks
Buy on Amazon More tools

Coin / button cell tester
Quick check for CR / LR / SR coin cells
Open-circuit voltage alone does not prove remaining capacity.
How to test a coin cell Buy on Amazon

Buy links are optional and separate from the battery answer.

Need one?

Need a ZA5?

Search Amazon for packs of this battery code.

Buy on Amazon Amazon UK

Buy links go to Amazon (Associates where tagged) or other affiliate programmes when available. They never change the battery answer.