1-2 Day Delivery SYD MEL BRI ADL
Call 1300 189 667
Questions? 1300 189 667
18650 vs 21700 vs 22650 vs 18500
When selecting the right rechargeable battery for your device, understanding the differences between various cell types is crucial. In this guide, we'll compare four popular lithium-ion battery sizes: 18650, 21700, 22650, and 18500. We'll explore their specifications, advantages, and typical applications to help you make an informed decision.
Understanding Battery Nomenclature
Battery names like 18650 and 21700 are derived from their dimensions:
- First two digits: Diameter in millimeters.
- Next two digits: Length in millimeters.
- Final digit: Shape; '0' denotes a cylindrical cell.
For example, an18650 battery measures 18mm in diameter and 65mm in length.
Detailed Comparison
| Battery Type | Dimensions (mm) | Typical Capacity (mAh) | Common Applications | Notes |
|---|---|---|---|---|
| 18500 | 18 x 50 | 1500–2000 | Flashlights, E-cigarettes, Portable Fans | Compact size; less capacity. |
| 18650 | 18 x 65 | 2000–3500 | Laptops, Power Tools, Electric Vehicles | Widely used; good balance of size and capacity. |
| 21700 | 21 x 70 | 3000–5000+ | Electric Vehicles, High-Performance Flashlights, E-bikes | Higher energy density; used in Tesla vehicles. |
| 22650 | 22 x 65 | 3000–5200 | Flashlights, Power Banks | Larger diameter; less common. |
Choosing the Right Battery
![]()
When selecting a battery, consider the following:
- Device Compatibility: Ensure the battery fits your device's specifications.
- Capacity Needs: Higher capacity offers longer runtime but may increase size and weight.
- Discharge Rate: High-drain devices require batteries with higher discharge rates.
- Brand Reputation: Opt for reputable brands to ensure safety and performance.
Where to Purchase
For high-quality batteries, consider visiting Battery Mate, a trusted supplier offering a wide range of rechargeable batteries to suit various applications.
Understanding the differences between these battery types will help you choose the most suitable one for your needs, ensuring optimal performance and safety for your devices.
26650 vs 21700 vs 18650 Battery: Power, Size & Applications
Compare 26650 vs 21700 vs 18650 batteries by size, capacity, and performance. Find the best fit for your needs with this energy guide.