List of Lithium-ion Battery Sizes and Uses

Mar 15, 2020 | XTAR

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.

NamesSimilar SizeCapacity (mAh)Dimensions (mm)
Uses
DiameterLength
10440AAA250 – 3501044mainly used in mini electronic products, such as tiny flashlights, mini stereos, loudspeakers, etc
14500AA700 – 10001450consumer electronics, such as LED flashlights, wireless audio, electric toys, digital cameras, etc.
16340CR123A400 – 9001634LED flashlights, headlights, laser lights, etc.
18650/1500 – 35001865Used in many laptop computer batteries, cordless power tools, certain electric cars, electric kick scooters, most e-bikes, vaping, and LED flashlights.
21700/3000 – 50002170E-bikes, solar street lights, LED lights, portable power tools, etc.
26650/2400 – 57502665For radio control hobby use. Also used in larger, high-powered LED flashlights and some electronic cigarettes.
32650/5000 – 65003267.7Suitable 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
Normal CapacityNormal VoltageMax Continuous Discharge CurrentMax Pulse Discharge CurrentEnergy
Protected or
Unprotected

Positive Pole (Button/Flat)

Weight

Size
217005000mAh3.6V10A/18Wh


Protected



Button Top



71g



21.5 x 74.5mm
217004900mAh3.6V10A/17.64Wh

Protected


Button Top
 72g

21.4 x 74.8mm
21700H4000mAh3.6V25A40A14.4Wh
Unprotected


Flat Top


69g



21.5 x 70.5mm
18650H2600mAh3.6V20A30A9.36 Wh


Unprotected



Flat Top



47g



18.5 x 65.2mm
186503500mAh3.6V10A/12.6Wh

Protected


Button Top


48g


18 x 68mm
186503300mAh3.6V10A/10.8Wh

Protected


Button Top


50g


18.4 x 68.8mm
186502600mAh3.7V4.5A/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 1.5V2000mAh1.5V2A/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

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