26650 Battery
Large format Li-ion with very high capacity and current capability. Name comes from dimensions: 26mm diameter × 65mm height. Higher capacity and current than 18650/21700.
Quick Specifications
Voltage
3.7V
Capacity
4000-5500 mAh
Size
⌀26 mm
Height
65 mm
Technical Drawing
Dimensions shown in mm. Drawing not to scale.
Chemistry & Performance
| Chemistry | Voltage | Capacity | End Voltage |
|---|---|---|---|
| Lithium Ion | 3.7V | 4000-5500 mAh | V |
Physical Specifications
- Diameter
- 26 mm
- Height
- 65 mm
- Weight (typical)
- 85-95 g
Common Uses
- High-power flashlights
- E-bikes
- Power tools
- Energy storage
- Mod vapes
Temperature Range
Operating
-20°C to 60°C
Storage
-30°C to 70°C
Data Sources
- Wikipedia - 18650 Battery
Retrieved: 2025-09-01
- Battery University - Types of Battery Cells
Retrieved: 2025-09-01