371 Battery Equivalent
371 is the SR920SW cell: 1.55 V silver oxide, 9.5 × 2 mm, so anything marked SG6, 370, V370 and V371 is the same battery and will fit.
Full SR920SW page: every equivalent, the sizes and what not to use
- Chemistry
- silver oxide
- Voltage
- 1.55 V
- Size (Ø × H)
- 9.5 × 2 mm
- Typical capacity
- 35–40 mAh
IEC designation SR921. Sold as 370 ( high drain, W) , 371 ( low drain, SW) , V370 ( high drain, W) and V371 ( low drain, SW) .
What the 371 code is
371 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 371 and its IEC name look unrelated.
The IEC code for the same cell is SR920SW: silver oxide, 1.55 V, 9.5 × 2 mm.
371 is the low-drain number for SR920SW: built for a steady trickle, such as a plain quartz watch movement. The same case size is also sold as 370, the high-drain number. Both are 1.55 V and both fit the same holder.
SR920SW equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- SG6
- 370 · High drain (W)
- V370 · High drain (W)
- 371 · Low drain (SW)
- V371 · Low drain (SW)
- SR69
- SR920
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| LR920 | 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 |
|---|---|---|
| SR45 | 9.5 × 3.6 mm | Same 9.5 mm diameter, but 3.6 mm tall instead of 2 mm. Only if the holder fits; thinner cells can lose contact. |
| SR916SW | 9.5 × 1.6 mm | Same 9.5 mm diameter, but 1.6 mm tall instead of 2 mm. Only if the holder fits; thinner cells can lose contact. |
| SR927SW | 9.5 × 2.7 mm | Same 9.5 mm diameter, but 2.7 mm tall instead of 2 mm. Only if the holder fits; thinner cells can lose contact. |
371 questions
- What battery is 371?
- 371 is the SR920SW: a 1.55 V silver oxide cell, 9.5 × 2 mm, with a typical capacity of 35–40 mAh.
- Is 371 the same as SR920SW?
- Yes. They are two codes for one cell, so a pack marked either way holds the same battery.
- Is 371 low drain or high drain?
- 371 is the low-drain number for SR920SW: built for a steady trickle, such as a plain quartz watch movement. The same case size is also sold as 370, the high-drain number. Both are 1.55 V and both fit the same holder.
- What can I use instead of 371?
- Any code in the direct replacement list above. LR920 is the same size in another chemistry: Works, but runs out sooner. Avoid in watches and medical devices.
- What voltage is 371?
- 1.55 V, the same as any other SR920SW.