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 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

V. Prismatic Lithium Battery Size Chart

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.

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High-performance 36V 10Ah water bottle lithium battery for electric bikes. Lightweight 3.5kg, fast charging in 1.5–2 hours, safe & durable with up to 500 cycles. Ideal for commuting and long rides.

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high-performance 18650 Battery 4000mAh, offering stable 24V power and deep cycle support. Perfect for electric scooters, power tools, and energy storage systems. Built-in safety protections ensure long-lasting, reliable performance.

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Apsenx 33140 LiFePO4 battery cell (14500mAh, 3.2V). High capacity, long cycle life, safe chemistry. Ideal for ESS, EV, UPS, and solar storage.

ICR 18650 3.7v 2200mAh Li-ion Battery

August 18, 2025

Wholesale ICR 18650 2200mAh 3.7V lithium batteries with optional customized packs. Supports external wiring and various wire leads to meet your project-specific needs.