AG1 Battery
Also known as: LR621
Very small button cell commonly used in watches and miniature electronics. Available in both alkaline (AG1/LR621) and silver oxide (364/SR621SW) chemistries. Silver oxide provides more stable voltage.
Quick Specifications
Voltage
1.5V
Capacity
18mAh mAh
Size
⌀6.8 mm
Height
2.1 mm
Technical Drawing
Dimensions shown in mm. Drawing not to scale.
Chemistry & Performance
| Chemistry | Voltage | Capacity | End Voltage |
|---|---|---|---|
| Alkaline | 1.5V | 18mAh mAh | 0.9V |
| Silver Oxide | 1.55V | 25mAh mAh | 1.2V |
Physical Specifications
- Diameter
- 6.8 mm
- Height
- 2.1 mm
- Weight (alkaline)
- 0.3 g
- Weight (silver_oxide)
- 0.35 g
Standard Designations
IEC Code
LR621
ANSI Code
164
Common Uses
- Watches
- Small toys
- Calculators
- Digital thermometers
- Small electronics
- Medical devices
Temperature Range
Operating
-10°C to 60°C
Storage
-20°C to 70°C
Data Sources
- Wikipedia - Button Cell
Retrieved: 2025-09-01