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Q: What is 18650 battery?

Q: What is 18650 battery?

A: 18650 Battery is a lithium-ion rechargeable battery. The first 4 digits of the designation “18650” indicate the physical dimensions while the 5 th digit indicates it is a cylinder cell. The standard 18650 battery is 18mm and around 65mm long. This type of battery is very common in applications such as laptop battery packs, flashlights, electric vehicles, cordless tools, and various other devices that require portable power.

Some types of 18650 have been modified adding either a button top and/or internal protection circuit. This can increase the physical length of an “18650” battery from 65mm to 70mm or
in certain cases even longer.  If you’re using an 18650 battery for a consumer product, you should always verify with that product’s manufacturer for the exact specifications required to power the device.

Q: What is so special about the 18650 battery?

A: The 18650 battery has a voltage of 3.7v and has between 2600mAh and 3500mAh (mili-amp-hours). (Osborne, 2019) These batteries are used in flashlights, laptops, electronics, and even some electric cars because of their reliability, long run times, and ability to be recharged hundreds of times over.

Q: Is the 18650 battery as same as the AA?

A: Is an 18650 battery the same as an AA? No, these batteries differ in size and hence discharge performance. While 18650 batteries feature various lithium chemistries, AA batteries feature even more chemistries.

Q: What is an 18650 battery equivalent to?

A: They are LiFePO4, LiMn2O4, LiNiMnCoO2, LiNiCoAlO2, LiNiCoO2, and LiCoO2 . All these batteries vary slightly in nominal voltage and capacity. The other features are relatively the same. 21700, 26650, 16340, and 14500 are some batteries that can be replaced with 18650 in your everyday projects.

Q: Can I use an AA battery instead of an 18650?

A: NO. AA batteries run at 1.5 volts on average for around 1800 Milliamp hours while 18650s run at around 3.7 volts, and around 3000 milliamp hours. you could use AA rechargeables, but you would need many more of them for the same purpose, and they wear out much faster.


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Written by Ruibosi Electronic Co., LTD  

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