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.

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		Normal Capacity	Normal Voltage	Max Continuous Discharge Current	Max Pulse Discharge Current	Energy	Protected or Unprotected	Positive Pole (Button/Flat)	Weight	Size
	21700	5000mAh	3.6V	10A	/	18Wh	Protected	Button Top	71g	21.5 x 74.5mm
	21700	4900mAh	3.6V	10A	/	17.64Wh	Protected	Button Top	72g	21.4 x 74.8mm
	21700H	4000mAh	3.6V	25A	40A	14.4Wh	Unprotected	Flat Top	69g	21.5 x 70.5mm
	18650H	2600mAh	3.6V	20A	30A	9.36 Wh	Unprotected	Flat Top	47g	18.5 x 65.2mm
	18650	3500mAh	3.6V	10A	/	12.6Wh	Protected	Button Top	48g	18 x 68mm
	18650	3300mAh	3.6V	10A	/	10.8Wh	Protected	Button Top	50g	18.4 x 68.8mm
	18650	2600mAh	3.7V	4.5A	/	9.62 Wh	Protected	Button Top	47g	18 x 68mm
	26650	5200mAh	3.6V	7A	/	18.72Wh	Protected	Flat Top	95.5g	26 x 68mm
	16340	650mAh	3.7V	0.95A	/	2.405Wh	Protected	Button Top		16 x 34mm
	14500	800mAh	3.7V	1.5A	/	2.96Wh	Protected	Button Top	19g	14 x 50mm
	CR123A	1400mAh	3.0V	1.4A	/	4.2 Wh	/	Button Top		17 x 34.5mm
	AA 1.5V	2000mAh	1.5V	2A	/	3 Wh	Protected	Button Top	19g	14.5 x 50mm

For vapers, the XTAR 21700 4200mAh 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: info@xtar.cc