18650 Lithium-Ion Battery 2400mAh 3.7V Rechargeable Battery
The 18650 Lithium-Ion Battery 2400mAh 3.7V Rechargeable Battery delivers reliable, high-capacity power for demanding portable projects. With 2400mAh capacity, it provides extended runtime for flashlights, power banks, and electronics.
Key Features
- 2400mAh capacity for long runtime
- 3.7V nominal voltage (4.2V max, 3.0V min)
- Rechargeable Li-ion chemistry
- High discharge rate capability
- Flat top terminal (verify compatibility)
- Standard 18650 size (18mm x 65mm)
- Low self-discharge when stored
Technical Specifications
| Parameter |
Specification |
| Chemistry |
Li-ion (ICR/INR) |
| Capacity |
2400mAh |
| Nominal Voltage |
3.7V |
| Max Voltage |
4.2V |
| Min Voltage |
3.0V (cutoff) |
| Dimensions |
18mm x 65mm |
| Weight |
~45g |
| Terminal Type |
Flat top |
| Cycle Life |
300-500 cycles |
Applications
- Power banks and portable chargers
- Flashlights and lighting
- Portable electronics
- UPS and backup power
- Arduino/Raspberry Pi mobile projects
- Solar energy storage
Important Notes
- Only use with proper charger (TP4056 for single cell, balance charger for packs)
- Never discharge below 3.0V – will damage cell permanently
- Do not short circuit – risk of fire and explosion
- Store at 3.6-3.8V for long-term storage
- Verify terminal type (flat/button top) matches your holder
- Use protected cells if your device lacks undervoltage protection
