flat head 18650 3.7v 9900mah lipo battery

flat head 18650 3.7v 9900mah lipo battery


The 18650 3.7V 9900mAh lithium-ion battery is a rechargeable cell known for its high capacity and energy density. It is commonly used in applications where long-lasting power and reliability are essential, such as in high-drain electronic devices, power tools, flashlights, and more. This battery type provides a balance between capacity, size, and performance, making it a popular choice for both consumer and industrial applications.

Key Features:

  • Battery Type: Lithium-ion (Li-ion)
  • Nominal Voltage: 3.7V
  • Capacity: 9900mAh (9.9Ah), indicating a high storage capacity per charge
  • Chemistry: Rechargeable Li-ion technology known for its energy density and cycle life
  • Terminal Type: Typically features flat top terminals, suitable for certain applications
  • Safety Features: Includes built-in protection against overcharging, over-discharging, and short circuits
  • Size: Standard 18650 cell size (18mm diameter, 65mm length)
  • Weight: Lightweight relative to its capacity, typically around 45-50 grams per cell

Technical Specifications:

  • Operating Voltage: 3.0V to 4.2V (typical operating range)
  • Charge Voltage: Up to 4.2V per cell during charging
  • Discharge Cut-off Voltage: Around 3.0V for prolonging battery life
  • Cycle Life: Hundreds of recharge cycles depending on usage and maintenance
  • Applications: Suitable for high-drain devices like flashlights, power banks, electric vehicles, and more demanding electronic projects


  • Consumer Electronics: Powers various portable devices requiring long-lasting battery performance.
  • Power Tools: Used in cordless power tools for extended operation times.
  • Electric Vehicles: Provides energy storage in electric bicycles and small-scale electric vehicles.
  • Solar Energy Storage: Used in solar power storage systems for energy backup and off-grid applications.
  • DIY Projects: Ideal for building custom battery packs and experimenting with portable power solutions.

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