18650 vs 16650 Battery, Comprehensive Comparison

The 18650 battery is a commonly used lithium-ion rechargeable battery with a standardized cylindrical shape. The designation “18650” is derived from its dimensions: 18mm in diameter and 65.0mm in length. The 16650 battery is a lithium-ion rechargeable battery that is part of the 16mm diameter battery family. Let’s compare the 18650 and 16650 batteries in detail, covering various aspects including size, capacity, voltage, applications, and more.

18650 vs 16650 Battery, Comprehensive Comparison
18650 vs 16650 Battery Comprehensive Comparison

1. Size and Dimensions:

  • 18650 Battery:
    • Diameter: 18mm
    • Length: 65mm
  • 16650 Battery:
    • Diameter: 16mm
    • Length: 65mm

The main difference lies in the diameter, with the 18650 being slightly larger in diameter.

2. Capacity:

  • 18650 Battery:
    • Typically ranges from 2000 mAh to 3500 mAh, but newer versions can go even higher.
  • 16650 Battery:
    • Typically ranges from 2000 mAh to 2500 mAh.

The 18650 battery generally has a higher capacity due to its larger size.

3. Voltage:

  • Both 18650 and 16650 batteries have a nominal voltage of 3.7 volts.

4. Chemistry:

  • Both batteries use lithium-ion technology, providing a good balance between energy density, capacity, and weight.

5. Applications:

  • 18650 Battery:
    • Widely used in various devices such as laptops, power tools, electric vehicles, flashlights, and more.
  • 16650 Battery:
    • Commonly used in devices like flashlights, portable power banks, and other small electronics.

Due to its higher capacity and versatility, the 18650 battery finds applications in a broader range of devices.

6. Rechargeability:

  • Both 18650 and 16650 batteries are rechargeable and can be recharged using compatible lithium-ion battery chargers.

7. Availability and Popularity:

  • 18650 Battery:
    • More popular and widely available due to its extensive use in a wide range of devices.
  • 16650 Battery:
    • Less common and may be harder to find compared to the 18650 battery.

8. Heat Dissipation and Discharge Rates:

  • The larger size of the 18650 battery allows for better heat dissipation during usage.
  • The 18650 battery can generally handle higher discharge rates compared to the 16650 battery.

9. Cost:

  • 18650 batteries are often more readily available and may have a slightly lower cost due to their wider production and use.

10. Weight:

  • Due to its larger size and higher capacity, the 18650 battery is typically heavier than the 16650 battery.

In summary, the choice between the 18650 and 16650 battery would depend on the specific application, considering factors such as space constraints, power requirements, and availability. The 18650 battery is more common and versatile, making it suitable for a wide range of applications, while the 16650 battery is more compact and may find use in smaller electronic devices.

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