The Samsung 18650 battery is a popular rechargeable lithium-ion cell widely used in laptops, flashlights, power banks, electric vehicles, and other portable electronics. It has a cylindrical shape with dimensions approximately 18mm in diameter and 65mm in length, known for its reliable performance, high energy density, and safety features.
- Nominal Voltage: 3.6 V – 3.7 V (varies slightly by model)
- Capacity: Typically ranges from 1800 mAh up to 3500 mAh, depending on the model
- Chemistry: Lithium-ion (Li-ion)
- Dimensions: 18 mm diameter × 65 mm length
- Rechargeable: Yes
- Cycle Life: Around 300 to 500+ charge cycles (varies by usage and model)
- Protection: Many Samsung 18650 cells include built-in protection circuits (PCM/BMS) against overcharge, over-discharge, and short circuit (for protected variants)
- Applications: Laptops, power tools, electric vehicles, e-bikes, flashlights, vaping devices, and portable electronics
