lithium battery sizes：Common Sizes and Specifications
Lithium batteries have become a staple in everyday electronics thanks to their high energy density, large capacity, and long service life. From personal gadgets to electric vehicles, these batteries are everywhere. Here’s a breakdown of their sizes, models, and parameters that I find useful when selecting batteries.
I. Standards and Codes for Lithium Battery Sizes
Lithium battery sizes are standardized internationally. The standards differ based on battery type:
Cylindrical Batteries: Examples include 18650, 14500, 26650. The size format is diameter × height (mm).
Prismatic Batteries: Examples include 503450, 902540. The size format is length × width × thickness (mm).
II. Common Lithium Battery Models and Sizes
18650 Battery
The 18650 battery is one of the most widely used cylindrical lithium batteries. Its name comes from its size: 18 mm diameter × 65 mm height, with “0” indicating a rounded shape. I often see these in laptop packs, high-performance electric bicycles, and handheld devices.
14500 Battery
The 14500 measures 14 mm × 50 mm and is popular in flashlights, LED torches, baby monitors, and small cameras.
26650 Battery
With a diameter of 26 mm and a height of 65 mm, the 26650 has a large capacity, long life, and low internal resistance, making it ideal for electric bicycles, vehicles, and marine applications.
III. Key Lithium Battery Parameters
When I choose a lithium battery, I always check these parameters:
Battery Model: Usually a combination of letters and numbers representing the chemical composition, size, and capacity.
Capacity: Measured in mAh, indicating how much energy the battery can store. Higher capacity means longer usage.
Voltage: Typically 3.7V, though some batteries range from 3.2V to 4.2V depending on charging and discharge state.
Size: Battery dimensions affect device compatibility, so it’s important to pick the right size.
Weight: Lithium batteries are lighter than many other types, but specifications vary, so I select based on usage requirements.
IV. Cylindrical Lithium Battery Size Chart
ModelDiameter (mm)Length (mm)Capacity (mAh)1865018651500-3600185001850800-1600145001450500-12002665026653000-45003265032655000-6500104401044300-600163401634800-1200
V. Prismatic Lithium Battery Size Chart
ModelDimensions (mm)Capacity (mAh)8020408 × 20 × 40300-6008511258.5 × 11 × 25300-50010345010 × 34 × 50800-15001040010 × 40 × 502000-30001045010 × 45 × 502000-30001046010 × 46 × 502200-32001443014 × 43 × 30500-1000
Conclusion
By referencing these size charts, I can easily understand the specifications and models of common cylindrical and prismatic lithium batteries. When purchasing, I make sure to choose the right size and capacity for my device. Additionally, I always prioritize high-quality brands to ensure safety and reliable performance.
