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
| 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.
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