lithium battery sizes：Common Sizes and Specifications

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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

Model	Diameter (mm)	Length (mm)	Capacity (mAh)
18650	18	65	1500-3600
18500	18	50	800-1600
14500	14	50	500-1200
26650	26	65	3000-4500
32650	32	65	5000-6500
10440	10	44	300-600
16340	16	34	800-1200

V. Prismatic Lithium Battery Size Chart

Model	Dimensions (mm)	Capacity (mAh)
802040	8 × 20 × 40	300-600
851125	8.5 × 11 × 25	300-500
103450	10 × 34 × 50	800-1500
10400	10 × 40 × 50	2000-3000
10450	10 × 45 × 50	2000-3000
10460	10 × 46 × 50	2200-3200
14430	14 × 43 × 30	500-1000

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.

What Are the Dimensions of 18650 Battery?

If you’ve ever searched for lithium batteries for flashlights, laptops, power tools, or battery packs, you’ve probably come across the 18650 battery. It’s one of the most widely used rechargeable lithium-ion battery formats in the world.If you want learn about Size of 18650 Battery you can also read this guide:What Are the Dimensions of 18650 Battery?