18650 Battery
Also known as: Lithium-ion cylindrical cell
Most popular lithium-ion format. Name comes from dimensions: 18mm diameter × 65mm height. Maximum commercial capacity as of 2024 is 3600mAh. Widely used in consumer electronics and electric vehicles.
Quick Specifications
Voltage
3.7V
Capacity
1200-3600 mAh
Size
⌀18.6 mm
Height
65.2 mm
Technical Drawing
Dimensions shown in mm. Drawing not to scale.
Chemistry & Performance
| Chemistry | Voltage | Capacity | End Voltage |
|---|---|---|---|
| Lithium Ion | 3.7V | 1200-3600 mAh | V |
Physical Specifications
- Diameter
- 18.6 mm
- Height
- 65.2 mm
- Weight (typical)
- 45-50 g
Common Uses
- Laptops (battery packs)
- Power banks
- Electric vehicles (Tesla Model S/X)
- Vape mods
- Flashlights
- Power tools
- E-bikes
- Solar storage systems
Temperature Range
Operating (Discharge)
-20°C to 60°C
Operating (Charge)
0°C to 45°C
Storage
-20°C to 60°C
Data Sources
- 18650 Battery Store Technical Guide
Retrieved: 2025-01-09
- Wikipedia 18650 Battery Technical Reference
Retrieved: 2025-01-09