392 Battery Equivalent
392 is the SR41 cell: 1.55 V silver oxide, 7.9 × 3.6 mm, so anything marked SG3, 384 and SR736 is the same battery and will fit.
Full SR41 page: every equivalent, the sizes and what not to use
- 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) .
What the 392 code is
392 is one of the three-digit numbers Energizer and Renata use for silver-oxide watch cells. The digits encode nothing about the size, which is why a 392 and its IEC name look unrelated.
The IEC code for the same cell is SR41: silver oxide, 1.55 V, 7.9 × 3.6 mm.
392 is the high-drain number for SR41: built for short bursts of heavier current, such as a watch with a backlight, an alarm or a chronograph. The same case size is also sold as 384, the low-drain number. Both are 1.55 V and both fit the same holder.
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.
392 questions
- What battery is 392?
- 392 is the SR41: a 1.55 V silver oxide cell, 7.9 × 3.6 mm, with a typical capacity of 45 mAh.
- Is 392 the same as SR41?
- Yes. They are two codes for one cell, so a pack marked either way holds the same battery.
- Is 392 low drain or high drain?
- 392 is the high-drain number for SR41: built for short bursts of heavier current, such as a watch with a backlight, an alarm or a chronograph. The same case size is also sold as 384, the low-drain number. Both are 1.55 V and both fit the same holder.
- What can I use instead of 392?
- Any code in the direct replacement list above. LR41 is the same size in another chemistry: Works, but runs out sooner. Avoid in watches and medical devices.
- Is 312 a 392 replacement?
- No. Zinc-air hearing-aid cell: same size, but 1.45 V, needs air holes and drains once unsealed.
- What voltage is 392?
- 1.55 V, the same as any other SR41.