The difference between 18650 battery and AA No. battery is mainly reflected in the size, AA battery is also called No. 5 battery, the scientific name of 14500 battery, through 18650 battery and 14500 battery we can see that the size of the two batteries is significantly different, the two models of batteries have lithium battery cells, generally speaking 18650 is usually lithium batteries, while No. 5 battery usually refers to alkaline or carbon disposable batteries.
What is an 18650 battery.
Japan's SONY company that year in order to save costs and set a standard lithium-ion battery model, where 18 means the diameter of 18mm, 65 means the length of 65mm, 0 means a cylindrical battery.
What is AA battery.
AA batteries are also called No. 5 batteries, the scientific name of 14500 batteries, and 18650 batteries have obvious size differences.
What is the difference between 18650 battery and AA battery?
18650 lithium batteries and our usual AA/AAA (also called No. 5/7) batteries are distinctly different!
18650 is not a few batteries, but A-type batteries, diameter 18mm, generally lithium. 5 batteries (i.e. AA) is one of the battery types, its general refers to the size of 14mm diameter, 49mm height. 18650 lithium battery voltage is generally around 3.5 ~ 4.0V, the most common is 3.7V; while the voltage of the No. 5 battery is 1.5V (non-rechargeable) or 1.2V (rechargeable).
18650 lithium batteries and AA batteries are different.
1. Different size. Although 18650 and AA batteries look somewhat similar, but the size of the two is actually different, 18650 lithium battery specifications is 18 mm in diameter, 65 mm long; while the number 5 battery (in fact, the scientific name of the AA battery is 14500 batteries, also known as the number 5 battery) rules are 14 mm in diameter, 50 mm long. 18650 either length or diameter than the number 5 battery is quite large.
2. Different voltage. The voltage of lithium battery is generally around 3.5~4.0V, the most common is 3.7V; while the voltage of No.5 battery is 1.5V (non-rechargeable) or 1.2V (rechargeable).
3. The working principle (internal chemical reaction process) is different.
4. 18650 is a rechargeable battery, most of the ordinary No. 5 batteries are disposable, rechargeable rarely or can not be charged.
What are the advantages of 18650 lithium battery?
1, large capacity 18650 lithium battery capacity is generally 1200mah ~ 3600mah, while the general battery capacity is only about 800mah, if combined into 18650 lithium battery pack, that 18650 lithium battery pack is casually can break through the 5000mah.
2、Long life span
3, high safety performance 18650 lithium battery safety performance, non-explosive, non-combustible; non-toxic, non-polluting, after the RoHS trademark certification; a variety of safety performance in one go, the number of cycles is greater than 500 times; high temperature resistance performance is good, 65 degrees under the conditions of discharge efficiency of 100%. To prevent the short-circuit phenomenon of the battery, the positive and negative poles of 18650 lithium battery are separated. So the possibility of short circuit has been reduced to the extreme. You can add a protection plate to avoid overcharging and overdischarging the battery, which also extends the life of the battery.
4, high voltage 18650 lithium battery voltage is generally at 3.6V, 3.8V and 4.2V, much higher than the 1.2V voltage of NiCd and NiMH batteries.
5, no memory effect before charging without having to empty the remaining power, easy to use.
6、Small internal resistance
7, can be combined in series or parallel into 18650 lithium battery pack
8、Used in a wide range of notebook computers, walkie-talkies, portable DVDs, instruments, audio equipment, models, toys, video cameras, digital cameras and other electronic equipment.
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