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Advantages
1. Large capacity
18650 lithium battery capacity is generally between 1200mAh-3600mAh, and the general capacity is only about 800mAh, if combined into a 18650 lithium battery pack, then 18650 lithium battery pack can easily break through 5000mAh.

2. Long life
The 18650 lithium battery has a long service life, the normal life cycle can reach more than 500 times, is twice of the ordinary battery.

3. High safety performance
18650 lithium battery safety performance is high, no explosion, no burning; non-toxic, non-polluting, after RoHS trademark certification; all kinds of safety performance in one go, cycle times greater than 500 times; high temperature performance, the discharge efficiency is up to 100% under 65℃. In order to prevent battery short circuit, the positive and negative electrodes of the 18650 lithium battery are separated. So the possibility of its short circuit has been reduced to the extreme. A protection board can be added to prevent the battery from overcharging and over-discharging, which also extends the battery life.

4. High voltage
An 18650 lithium battery voltage is generally 3.6V, 3.8V and 4.2V, much higher than the 1.2V of nickel-cadmium and nickel-hydrogen batteries.

5. No memory effect
It is not necessary to empty the remaining power before charging, which is convenient to use.

6. The internal resistance is small
The internal resistance of the polymer battery is smaller than that of the general liquid battery. The internal resistance of the polymer battery can be less than 35mΩ, which greatly reduces the self-consumption of the battery and prolongs the standby time of the mobile phone. This polymer lithium battery that supports large discharge currents is an ideal choice for remote control models and is the most promising alternative to nickel-metal hydride batteries.

7. It can be combined in series connection or in parallel connection to form an 18650 lithium battery pack.

8. A wide range of uses
Electronic devices such as laptops, walkie-talkies, portable DVDs, instrumentation, audio equipment, model airplanes, toys, video cameras, digital cameras, etc.

Disadvantages

  • The biggest disadvantage of the 18650 lithium battery is that its size has been fixed. It is not well positioned when it is installed in some laptops or some products. Of course, this shortcoming can also be said to be an advantage. This is a disadvantage compared to the customizable and convertible size of lithium batteries such as other polymer lithium batteries. But, it is an advantage over some products with specified battery specifications.
  • The 18650 lithium battery is easy to short circuit or explosion, and it is also relative to the polymer lithium battery. If compared to a ordinary battery, this shortcoming is not so obvious.
  • 18650 lithium battery production needs to have a protection circuit to prevent the battery from being overcharged and causing discharge. Of course, this is a must for lithium batteries, which is also a disadvantage of lithium batteries, because the materials used in lithium batteries are basically lithium cobalt oxide materials, and lithium batteries of lithium cobalt oxide materials can't discharge at high current, safety Poor.
  • The production conditions of the 18650 lithium battery are high. Compared with the general battery production, the 18650 lithium battery has high requirements for production conditions, which undoubtedly increases the production cost.
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