364 Battery Equivalent
364 is the SR621SW cell: 1.55 V silver oxide, 6.8 × 2.1 mm, so anything marked SG1 and SR60 is the same battery and will fit.
Full SR621SW page: every equivalent, the sizes and what not to use
- Chemistry
- silver oxide
- Voltage
- 1.55 V
- Size (Ø × H)
- 6.8 × 2.1 mm
- Typical capacity
- 19 mAh
IEC designation SR621. Sold as 364 ( low drain, SW) .
What the 364 code is
364 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 364 and its IEC name look unrelated.
The IEC code for the same cell is SR621SW: silver oxide, 1.55 V, 6.8 × 2.1 mm.
364 is the low-drain number for SR621SW: built for a steady trickle, such as a plain quartz watch movement.
SR621SW equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- SG1
- 364 · Low drain (SW)
- SR60
- SR621
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| LR621 | 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.
364 questions
- What battery is 364?
- 364 is the SR621SW: a 1.55 V silver oxide cell, 6.8 × 2.1 mm, with a typical capacity of 19 mAh.
- Is 364 the same as SR621SW?
- Yes. They are two codes for one cell, so a pack marked either way holds the same battery.
- Is 364 low drain or high drain?
- 364 is the low-drain number for SR621SW: built for a steady trickle, such as a plain quartz watch movement.
- What can I use instead of 364?
- Any code in the direct replacement list above. LR621 is the same size in another chemistry: Works, but runs out sooner. Avoid in watches and medical devices.
- What voltage is 364?
- 1.55 V, the same as any other SR621SW.