LR521 Battery Equivalent
LR521 is the same cell as AG0 and LR63, so any of those codes will fit; SR521SW is the same size in silver oxide and holds a steadier voltage for longer.
- Chemistry
- alkaline
- Voltage
- 1.5 V
- Size (Ø × H)
- 5.8 × 2.1 mm
- Typical capacity
- 10 mAh
IEC designation LR521.
LR521 equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- AG0
- LR63
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| SR521SW | 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.
About the LR521 cell
Alkaline version of the same size; voltage sags as it drains.
LR521 questions
- Is AG0 the same as LR521?
- Yes. AG0 is another code for the same cell: alkaline, 1.5 V, 5.8 × 2.1 mm.
- Is LR63 the same as LR521?
- Yes. LR63 is another code for the same cell: alkaline, 1.5 V, 5.8 × 2.1 mm.
- Can I use SR521SW instead of LR521?
- Upgrade: steadier voltage, longer life.
- Will LR516 work in place of LR521?
- Same 5.8 mm diameter, but 1.6 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact.
- Will LR527 work in place of LR521?
- Same 5.8 mm diameter, but 2.7 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact.
- What voltage is LR521?
- LR521 is a 1.5 V alkaline cell with a typical capacity of 10 mAh.
- What size is LR521?
- 5.8 mm across and 2.1 mm thick.