LR721 Battery Equivalent
LR721 is the same cell as 162, AG11 and LR58, so any of those codes will fit; SR721SW is the same size in silver oxide and holds a steadier voltage for longer.
- Chemistry
- alkaline
- Voltage
- 1.5 V
- Size (Ø × H)
- 7.9 × 2.1 mm
- Typical capacity
- 18–25 mAh
IEC designation LR721.
LR721 equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- 162
- AG11
- LR58
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| SR721SW | silver oxide | 1.55 V | Upgrade Upgrade: steadier voltage, longer life. |
Similar size, check the fit
Same diameter, different thickness. These are not drop-in replacements.
| Cell | Size | Verdict |
|---|---|---|
| LR41 | 7.9 × 3.6 mm | Same 7.9 mm diameter, but 3.6 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact. |
| LR48 | 7.9 × 5.4 mm | Same 7.9 mm diameter, but 5.4 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact. |
| LR726 | 7.9 × 2.6 mm | Same 7.9 mm diameter, but 2.6 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact. |
| LR731 | 7.9 × 3.1 mm | Same 7.9 mm diameter, but 3.1 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact. |
About the LR721 cell
Alkaline version of the same size; voltage sags as it drains.
LR721 questions
- Is 162 the same as LR721?
- Yes. 162 is another code for the same cell: alkaline, 1.5 V, 7.9 × 2.1 mm.
- Is AG11 the same as LR721?
- Yes. AG11 is another code for the same cell: alkaline, 1.5 V, 7.9 × 2.1 mm.
- Can I use SR721SW instead of LR721?
- Upgrade: steadier voltage, longer life.
- Will LR41 work in place of LR721?
- Same 7.9 mm diameter, but 3.6 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact.
- Will LR48 work in place of LR721?
- Same 7.9 mm diameter, but 5.4 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact.
- What voltage is LR721?
- LR721 is a 1.5 V alkaline cell with a typical capacity of 18–25 mAh.
- What size is LR721?
- 7.9 mm across and 2.1 mm thick.