AG1 Battery Equivalent
AG1 is the LR621 cell: 1.5 V alkaline, 6.8 × 2.1 mm, so anything marked 164 and LR60 is the same battery and will fit.
Full LR621 page: every equivalent, the sizes and what not to use
- Chemistry
- alkaline
- Voltage
- 1.5 V
- Size (Ø × H)
- 6.8 × 2.1 mm
- Typical capacity
- 13 mAh
IEC designation LR621.
What the AG1 code is
AG1 is a generic trade number rather than an IEC designation. The AG series is common on generic and own-brand alkaline cells, sold in strips and multipacks, and it numbers the sizes in sequence instead of describing them.
The IEC code for the same cell is LR621, which is the number you will find on branded packs and in device manuals.
LR621 equivalents
Direct replacements
The same cell under another code. Any of these fits, whatever the brand.
- 164
- AG1
- LR60
Upgrade or downgrade
Same size, different chemistry. Read the verdict before you buy.
| Cell | Chemistry | Voltage | Verdict |
|---|---|---|---|
| SR621SW | 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 |
|---|---|---|
| LR626 | 6.8 × 2.6 mm | Same 6.8 mm diameter, but 2.6 mm tall instead of 2.1 mm. Only if the holder fits; thinner cells can lose contact. |
AG1 questions
- What battery is AG1?
- AG1 is the LR621: a 1.5 V alkaline cell, 6.8 × 2.1 mm, with a typical capacity of 13 mAh.
- Is AG1 the same as LR621?
- Yes. They are two codes for one cell, so a pack marked either way holds the same battery.
- What can I use instead of AG1?
- Any code in the direct replacement list above. SR621SW is the same size in another chemistry: Upgrade: steadier voltage, longer life.
- What voltage is AG1?
- 1.5 V, the same as any other LR621.