18650 lithium battery has high energy density, so most of it is used in laptop battery. In addition, because 18650 has very good stability in work, it is widely used in various electronic fields. Commonly used in high-end glare flashlights, portable power supplies, wireless data transmitters, electric heating suits, shoe materials, portable instruments, portable lighting equipment, portable printers, industrial instruments, medical instruments, etc.
So how to choose a high-quality 18650 lithium-ion battery?
Choose the 18650 lithium battery that is most suitable for you
according to the electrical equipment, such as the appropriate brand,
voltage, capacity, continuous discharge rate, battery life, etc. The
most important thing is to choose a battery with high safety. Below we
will introduce in detail one by one.
1. Brand
In
terms of brands, there are internationally well-known brands such as
Sanyo, Samsung, SONY and LG that are more reliable. Sanyo and LG focus
on conventional applications, and their applications are mainly glare
flashlights, mobile power supplies and laptop batteries. SONY focuses on
high-current power supplies. Take VTC4 as an example, the discharge
current can reach 30A, electronic cigarettes, toys, etc., easy to
handle.
2. Nominal capacity
The nominal capacity of the 18650 battery
is related to the endurance. The higher the capacity, the stronger the
endurance. For example, a 2800mAh battery can be continuously discharged
for 2 hours at 1.4A.
3. Continuous discharge current (CDR)
The
continuous discharge capacity is represented by C. For example, the
capacity of an 18650 battery is 2800mAh and the continuous discharge
capacity is 0.5C, so the continuous discharge current is 1.4A.
Discharging over 1.4A for a long time will seriously affect the battery
life, and there may be dangers such as overheating, burning, and
explosion.
4. Internal resistance
The
smaller the internal resistance, the lower the consumption and the
stronger the discharge capacity. The internal resistance parameter will
generally be written on the battery introduction page. Please pay
attention when buying, try not to buy batteries above 100mΩ. If multiple
18650 batteries are used in series, batteries of the same brand and
model must be purchased, otherwise batteries with large internal
resistance and low capacity will become disadvantages.
5. Temperature
Temperature
is a major factor affecting the life of 18650 lithium batteries. The
higher the temperature, the more the battery will age. The higher the
temperature, the greater the internal damage of the battery.
6. Pointed and flat
The
pointed 18650 battery has a protective plate, and the flat 18650
battery does not have a protective plate. The 18650 lithium battery with
a protective plate is several millimeters higher than the 18650 lithium
battery without a protective plate, and the price is slightly more
expensive, but it is safer and more versatile. The 18650 lithium battery
has a protective plate to prevent the battery from over-discharging.
Excessive discharge of the battery will cause the lithium battery to
heat up, or even burn or explode.
Among
all 18650 lithium-ion batteries, LiSOCl2 has the highest energy
density, with the longest life span of 15-20 years. This type of battery
is particularly suitable for devices with relatively short supply
currents.
BENZO Energy Technology Co.,Ltd
UFine Technology Co., Ltd
Site: www.bz-battery.com / www.benzoenergy.com
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