312 Battery Equivalent (Hearing Aid)
312 is the same cell as ZA312 and PR41, so any of those codes will fit.
- Chemistry
- zinc air (hearing aid)
- Voltage
- 1.45 V
- Size (Ø × H)
- 7.9 × 3.6 mm
- Typical capacity
- 160 mAh
IEC designation PR41.
312 equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- Brown tab
- ZA312
Similar size, check the fit
Same diameter, different thickness. These are not drop-in replacements.
| Cell | Size | Verdict |
|---|---|---|
| 13 | 7.9 × 5.4 mm | Same 7.9 mm diameter, but 5.4 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
Do not use
These are the same size or a similar code, and they are not equivalents.
-
SR41
Not an equivalent. 312 is the same size, but it is a zinc-air hearing-aid cell: 1.45 V, it needs its air holes left open, and it starts draining as soon as the tab comes off.
-
LR41
Not an equivalent. 312 is the same size, but it is a zinc-air hearing-aid cell: 1.45 V, it needs its air holes left open, and it starts draining as soon as the tab comes off.
About the 312 cell
Activate by removing the tab; not a substitute for alkaline/silver cells of the same size.
On the shelf it is sold with a Brown tab on the pack : the tab seals the air holes, and the cell starts working, and running down, the moment you pull it off .
312 questions
- Is ZA312 the same as 312?
- Yes. ZA312 is another code for the same cell: zinc air (hearing aid), 1.45 V, 7.9 × 3.6 mm.
- Is PR41 the same as 312?
- Yes. PR41 is another code for the same cell: zinc air (hearing aid), 1.45 V, 7.9 × 3.6 mm.
- Will 13 work in place of 312?
- Same 7.9 mm diameter, but 5.4 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact.
- Can I use SR41 instead of 312?
- No. Not an equivalent. 312 is the same size, but it is a zinc-air hearing-aid cell: 1.45 V, it needs its air holes left open, and it starts draining as soon as the tab comes off.
- Can I use LR41 instead of 312?
- No. Not an equivalent. 312 is the same size, but it is a zinc-air hearing-aid cell: 1.45 V, it needs its air holes left open, and it starts draining as soon as the tab comes off.
- What voltage is 312?
- 312 is a 1.45 V zinc-air cell with a typical capacity of 160 mAh.
- What size is 312?
- 7.9 mm across and 3.6 mm thick, the same case size as the PR41 designation.