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List of Lithium-ion Battery Sizes and Uses
Lithium battery is a kind of chemical battery with high energy and high / low temperature adaptability. Its main characteristics are high energy density, high working voltage, low self-discharge rate, and no memory effect. Among them, the low self-discharge rate is the most prominent advantage of lithium batteries. Cylindrical lithium-ion battery cells are usually represented by five digits. From the left, the first and second digits refer to the cell diameter, the third and fourth digits refer to the battery height, and the fifth digit refers to the circle. For example, the 18650 means the diameter of this cell is 18mm, the height is 65mm and it is in cylindrical type. In addition to our common 18650 batteries, what other sizes do you know? The following introduces several sizes of lithium batteries.
| Names | Similar Size | Capacity (mAh) | Dimensions (mm) Diameter x Length | Uses |
| 10440 | AAA | 250 – 350 | 10 x 44 | mainly used in mini electronic products, such as tiny flashlights, mini stereos, loudspeakers, etc |
| 14500 | AA | 700 – 1200 | 14 x 50 | consumer electronics, such as LED flashlights, wireless audio, electric toys, digital cameras, etc. |
| 16340 | CR123A | 400 – 900 | 16 x 34 | LED flashlights, headlights, laser lights, etc. |
| 18650 | / | 1500 – 4000 | 18 x 65 | Used in many laptop computer batteries, cordless power tools, certain electric cars, electric kick scooters, most e-bikes, vaping, and LED flashlights. |
| 21700 | / | 3000 – 6000 | 21 x 70 | E-bikes, solar street lights, LED lights, portable power tools, etc. |
| 26650 | / | 2400 – 6000 | 26 x 65 | For radio control hobby use. Also used in larger, high-powered LED flashlights and some electronic cigarettes. |
| 32650 | / | 5000 – 6500 | 32 x 67.7 | Suitable for electric toys, backup power supply, UPS batteries, wind power generation systems, and wind-solar complementary power generation systems. |
Lithium-ion cells are made in various sizes, often assembled into battery packs for portable equipment. Many types are also available with an internal protection circuit to prevent over-discharge and short-circuit damage. This can increase their physical length; for example, an 18650 is around 65 mm long, but may be around 68 mm long with an internal protection circuit. Safe and economic recharging requires a high quality charger specified for these cells. Popular applications include laptop battery packs, electronic cigarettes, flashlights, electric vehicles, and cordless power tools.
There is also a kind of special lithium ion battery on the market. That is the 1.5V rechargeable AA and AAA Li-ion batteries. It is a 3.6/3.7V lithium battery be stepped down to a 1.5V constant voltage output through a built-in circuit module. It can replace the normal disposable AA/AAA alkaline batteries, more environmentally friendly.
XTAR Batteries Specifications
| Battery Type | Capacity (mAh) | Energy (mWh) | Voltage (V) | Max Continuous Discharge Current | Protected | Positive Pole | Dimensions (φ x L)mm |
| 14500 | 800 | 2960 | 3.7 | 2.25A | Yes | Button-Top | 14.3±0.03 50.5±0.05 |
| 1200 | 4320 | 3.6 | 10A | Yes | Button-Top | 14.3±0.3 50.5±0.5 | |
| 16340 | 650 | 2400 | 3.7 | 1.95A | Yes | Button-Top | 16.0±0.1 34.0±0.5 |
| 850 | 3060 | 3.6 | 2.5A | Yes | Button-Top | 16.5±0.3 34±0.5 | |
| CR123A | 1400 | 4200 | 3 | 1.4A | / | Button-Top | 17±1 34.5±1 |
| 18650 | 2600 | 9620 | 3.7 | 4.5A | Yes | Button-Top | 18.4±0.2 68.5±0.5 |
| 3300 | 11800 | 3.6 | 10A | Yes | Button-Top | 18.4±0.3 68.8±0.5 | |
| 3500 | 12600 | 3.6 | 10A | Yes | Button-Top | 18.4±0.3 69±0.5 | |
| 3600 | 12960 | 3.6 | 10A | Yes | Button-Top | 18.4±0.3 68.8±0.5 | |
| 4000 | 14400 | 3.6 | 10A | Yes | Button-Top | 18.4±0.3 69.2±0.5 | |
| 18650H | 2600 | 9360 | 3.6 | 20A/30A | / | Flat-Top | 18.5+0.2 65.2±0.3 |
| 21700 | 4900 | 17640 | 3.6 | 10A | Yes | Button-Top | 21.4±0.3 74.8±0.5 |
| 5000 | 18000 | 3.6 | 10A | Yes | Button-Top | 21.5±0.3 74.5±0.5 | |
| 26650 | 5200 | 18720 | 3.6 | 10A | Yes | Button-Top | 26.5±0.3 68.2±0.5 |
| 6000 | 21600 | 3.6 | 10A | Yes | Button-Top | 26.5±0.3 69.3±0.5 | |
| AA 1.5V | 1750 | 2700 | 1.5 | 2A | Yes | Button-Top | 14.3±0.3 50.3±0.5 |
| 2000 | 3300 | 1.5 | 2A | Yes | Button-Top | 14.5±0.3 50±0.5 | |
| 2500 | 4150 | 1.5 | 2A | Yes | Button-Top | 14.3±0.3 50.3±0.5 | |
| AAA 1.5V | 750 | 1200 | 1.5 | 2A | Yes | Button-Top | 10.3±0.3 44.5±0.5 |
| 1000 | 1620 | 1.5 | 2A | Yes | Button-Top | 10.3±0.3 44.2±0.5 |
For vapers, the XTAR 21700 5000mAh can be your best choice. Its high drain will bring you a great vapelife. For LED flashlights or other power devices, the XTAR 18650s with different capacity are your consideration. If you want a huge capacity, then take the XTAR 26650 battery. It is great for tactical operations, search and rescue, illumination, camping and outdoor excursions produce significant outputs in a compact body.
A large selection of our batteries can be bought in bulk, letting you take advantage of big discounts! You can directly contact our sales team now via email: [email protected]
