18650 & 21700 Battery Guide

Choosing the right lithium-ion battery for your needs can be a daunting task, given the variety of options available. This page provides detailed product specifications and comparisons to help you make an informed decision. Whether you are looking for 18650 or 21700 batteries, we've got you covered.

18650 Batteries

Specifications

  • Capacity: 2500mAh to 3500mAh
  • Voltage: 3.7V
  • Diameter: 18mm
  • Height: 65mm
  • Discharge Rate: 10A to 30A (Continuous)
  • Recharge Cycles: Up to 500 cycles
  • Applications: Flashlights, laptops, power tools, electric vehicles, portable chargers, medical devices, security cameras, video doorbells, solar storage systems

Popular Models

  1. Samsung 25R

    • Capacity: 2500mAh
    • Discharge Rate: 20A (Continuous)
    • Pros: High discharge rate, reliable performance
    • Cons: Moderate capacity

  2. Samsung 30Q

    • Capacity: 3000mAh
    • Discharge Rate: 15A (Continuous)
    • Pros: Good balance between capacity and discharge rate
    • Cons: Moderate discharge rate

  3. Murata VTC5A

    • Capacity: 2600mAh
    • Discharge Rate: 35A (Continuous)
    • Pros: Very high discharge rate, reliable performance
    • Cons: Lower capacity

  4. Murata VTC6

    • Capacity: 3000mAh
    • Discharge Rate: 15A (Continuous)
    • Pros: High capacity, good performance
    • Cons: Moderate discharge rate

  5. Panasonic NCR18650B

    • Capacity: 3400mAh
    • Discharge Rate: 6A (Continuous)
    • Pros: Very high capacity, ideal for low-drain applications
    • Cons: Low discharge rate

  6. Samsung 35E

    • Capacity: 3500mAh
    • Discharge Rate: 8A (Continuous)
    • Pros: High capacity, good for low-drain applications
    • Cons: Lower discharge rate

  7. Samsung 20S

    • Capacity: 2000mAh
    • Discharge Rate: 30A (Continuous)
    • Pros: Very high discharge rate, good for high-drain devices
    • Cons: Lower capacity

  8. Molicel P28A

    • Capacity: 2800mAh
    • Discharge Rate: 35A (Continuous)
    • Pros: Very high discharge rate, excellent performance
    • Cons: Lower capacity compared to other 18650 batteries

  9. Molicel P30B

    • Capacity: 3000mAh
    • Discharge Rate: 30A (Continuous)
    • Pros: Good balance of capacity and discharge rate
    • Cons: None significant

  10. Sanyo NCR18650GA

    • Capacity: 3500mAh
    • Discharge Rate: 10A (Continuous)
    • Pros: High capacity, good energy density
    • Cons: Lower discharge rate

21700 Batteries

Specifications

  • Capacity: 4000mAh to 5000mAh
  • Voltage: 3.7V
  • Diameter: 21mm
  • Height: 70mm
  • Discharge Rate: 10A to 45A (Continuous)
  • Recharge Cycles: Up to 500 cycles
  • Applications: Electric vehicles, high-drain devices, power banks, e-bikes, drones, portable power stations, high-performance flashlights

Popular Models

  1. Samsung 40T

    • Capacity: 4000mAh
    • Discharge Rate: 35A (Continuous)
    • Pros: High discharge rate, robust build
    • Cons: Lower capacity compared to other 21700 batteries

  2. Samsung 50E

    • Capacity: 5000mAh
    • Discharge Rate: 10A (Continuous)
    • Pros: High capacity, ideal for energy storage
    • Cons: Lower discharge rate

  3. Samsung 50S

    • Capacity: 5000mAh
    • Discharge Rate: 25A (Continuous)
    • Pros: Good balance between capacity and discharge rate
    • Cons: Higher cost

  4. Molicel P42A

    • Capacity: 4200mAh
    • Discharge Rate: 45A (Continuous)
    • Pros: Very high discharge rate, excellent performance
    • Cons: Higher cost

  5. Molicel P45B

    • Capacity: 4500mAh
    • Discharge Rate: 45A (Continuous)
    • Pros: High capacity and discharge rate, top-tier performance
    • Cons: Higher cost

  6. Murata VTC6A

    • Capacity: 4000mAh
    • Discharge Rate: 30A (Continuous)
    • Pros: High discharge rate, reliable performance
    • Cons: Moderate capacity

  7. Molicel M50A

    • Capacity: 5000mAh
    • Discharge Rate: 15A (Continuous)
    • Pros: High capacity, good for low to moderate drain applications
    • Cons: Lower discharge rate

  8. Samsung 30T

    • Capacity: 3000mAh
    • Discharge Rate: 35A (Continuous)
    • Pros: High discharge rate, robust build
    • Cons: Lower capacity

Comparison Chart

Battery Type Model Capacity Discharge Rate Voltage Recharge Cycles Application Examples
18650 Samsung 25R 2500mAh 20A (Continuous) 3.7V Up to 500 Flashlights, Laptops, Power Tools
18650 Samsung 30Q 3000mAh 15A (Continuous) 3.7V Up to 500 Power Tools, High-Drain Devices, Medical Devices
18650 Murata VTC5A 2600mAh 35A (Continuous) 3.7V Up to 500 High-Drain Devices, Portable Chargers
18650 Murata VTC6 3000mAh 15A (Continuous) 3.7V Up to 500 Flashlights, Laptops, Power Banks
18650 Panasonic NCR18650B 3400mAh 6A (Continuous) 3.7V Up to 500 Low-Drain Applications, Solar Storage Systems
18650 Samsung 35E 3500mAh 8A (Continuous) 3.7V Up to 500 Low-Drain Applications, Medical Devices
18650 Samsung 20S 2000mAh 30A (Continuous) 3.7V Up to 500 High-Drain Devices
18650 Molicel P28A 2800mAh 35A (Continuous) 3.7V Up to 500 Power Tools, High-Drain Devices
18650 Molicel P30B 3000mAh 20A (Continuous) 3.7V Up to 500 Power Tools, High-Drain Devices, Medical Devices
18650 Sanyo NCR18650GA 3500mAh 10A (Continuous) 3.7V Up to 500 Flashlights, Laptops, Power Banks, Solar Storage Systems
21700 Samsung 40T 4000mAh 35A (Continuous) 3.7V Up to 500 Electric Vehicles, Power Banks, High-Performance Flashlights
21700 Samsung 50E 5000mAh 10A (Continuous) 3.7V Up to 500 Energy Storage, Low-Drain Devices, Portable Power Stations
21700 Samsung 50S 5000mAh 25A (Continuous) 3.7V Up to 500 Electric Vehicles, High-Drain Devices, E-bikes
21700 Molicel P42A 4200mAh 45A (Continuous) 3.7V Up to 500 Electric Vehicles, High-Drain Devices, Drones
21700 Molicel P45B 4500mAh 45A (Continuous) 3.7V Up to 500 High-Performance Devices, E-bikes, Drones
21700 Murata VTC6A 4000mAh 30A (Continuous) 3.7V Up to 500 Electric Vehicles, High-Drain Devices, Portable Power Stations
21700 Molicel M50A 5000mAh 15A (Continuous) 3.7V Up to 500 Low to Moderate Drain Applications, Energy Storage
21700 Samsung 30T 3000mAh 35A (Continuous) 3.7V Up to 500 High-Drain Devices, High-Performance Flashlights

Selecting the right battery depends on your specific needs and applications. By understanding the specifications and comparing the available options, you can make a more informed decision. If you need further assistance, please feel free to contact our customer support team.

Find the perfect battery for your needs and enjoy reliable performance and long-lasting power!