SR41 Battery Equivalent
SR41 is the same cell as SG3, 384, 392 and SR736, so any of those codes will fit; LR41 is the same size in alkaline and will work, though it runs out sooner.
- Chemistry
- silver oxide
- Voltage
- 1.55 V
- Size (Ø × H)
- 7.9 × 3.6 mm
- Typical capacity
- 45 mAh
IEC designation SR736. Sold as 384 ( low drain, SW) and 392 ( high drain, W) .
SR41 equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- SG3
- 384 · Low drain (SW)
- 392 · High drain (W)
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| LR41 | alkaline | 1.5 V | Downgrade Works, but runs out sooner. Avoid in watches and medical devices. |
Similar size, check the fit
Same diameter, different thickness. These are not drop-in replacements.
| Cell | Size | Verdict |
|---|---|---|
| SR712SW | 7.9 × 1.2 mm | Same 7.9 mm diameter, but 1.2 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR714SW | 7.9 × 1.4 mm | Same 7.9 mm diameter, but 1.4 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR716SW | 7.9 × 1.65 mm | Same 7.9 mm diameter, but 1.65 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR721SW | 7.9 × 2.1 mm | Same 7.9 mm diameter, but 2.1 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR726SW | 7.9 × 2.6 mm | Same 7.9 mm diameter, but 2.6 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR731SW | 7.9 × 3.1 mm | Same 7.9 mm diameter, but 3.1 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact. |
| SR754SW | 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.
-
312
Zinc-air hearing-aid cell: same size, but 1.45 V, needs air holes and drains once unsealed.
Low drain or high drain
SR41 is sold under two numbers for the same case size. Manufacturers mark low-drain cells SW and high-drain cells W, which records what the cell is built to deliver rather than how big it is.
- Low drain (SW): 384
- A steady trickle of current: a quartz watch with hands, a thermometer, a key fob.
- High drain (W): 392
- Short bursts of heavier current: a watch with a backlight, an alarm or a chronograph.
Both are 1.55 V and both fit the same holder, so either will run the device. The matched one lasts longer.
SR41 questions
- Is SG3 the same as SR41?
- Yes. SG3 is another code for the same cell: silver oxide, 1.55 V, 7.9 × 3.6 mm.
- Is 384 the same as SR41?
- Yes. 384 is another code for the same cell: silver oxide, 1.55 V, 7.9 × 3.6 mm.
- Can I use LR41 instead of SR41?
- Works, but runs out sooner. Avoid in watches and medical devices.
- Will SR712SW work in place of SR41?
- Same 7.9 mm diameter, but 1.2 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact.
- Will SR714SW work in place of SR41?
- Same 7.9 mm diameter, but 1.4 mm tall instead of 3.6 mm. Only if the holder fits; thinner cells can lose contact.
- Can I use 312 instead of SR41?
- No. Zinc-air hearing-aid cell: same size, but 1.45 V, needs air holes and drains once unsealed.
- What voltage is SR41?
- SR41 is a 1.55 V silver oxide cell with a typical capacity of 45 mAh.
- What size is SR41?
- 7.9 mm across and 3.6 mm thick.