In life of modern people, mobile phones have become an indispensable part, and they can be used almost anytime and anywhere.
Therefore, we pay more and more attention to power of mobile phones, especially in some emergency situations, the loss of power of mobile phones can cause a lot of inconvenience and suffering.
However, how to properly charge a mobile phone is a problem that many people tend to ignore.
In daily use, we often encounter some problems such as slow charging speed, reduced battery life, etc. These problems are largely due to our charging habits.
Therefore, correct charging method and charging habits have become very important.
Then question is how to charge a mobile phone? Recharging after use? Charge less than 20%?
And answer is easy to find if you know your cell phone battery.
The first mobile phone batteries used nickel-cadmium batteries, which have characteristics of DC rechargeable batteries, are relatively cheap and have a long lifespan.
However, nickel-cadmium batteries also have some limitations, such as small capacity, long charging time, and battery life is affected by memory effect, so it is difficult to increase battery life.
Ni-cadmium batteries were later replaced by nickel-metal hydride batteries, which have higher capacity than nickel-cadmium batteries, faster charging speed and relatively longer life.
However, disadvantage of NiMH batteries is that they are heavy and relatively expensive.
Later, lithium-ion batteries became widely used, which are now widely used in our mobile phones.
Lithium-ion batteries have advantages of high energy density, large capacity, long life, short charging time and light weight.
At same time, lithium-ion batteries can also be shaped differently, making mobile phone design more flexible and diversified.
More importantly, it can be charged many times without memory effect, and some charging misunderstandings can be resolved naturally.
For example, when charging a new mobile phone for first time, it needs to be charged all day, at least 12 hours.
Actually, this charging method is designed for nickel-cadmium batteries.
Because it has a memory effect, and this operation can keep battery in working condition, so that battery life can be longer.
But today, lithium-ion batteries are not subject to memory effect, so naturally there is no need to follow this practice.
On contrary, do not continue to charge Li-ion battery when it is fully charged. Prolonged charging will affect battery life.
Of course, lithium-ion batteries are not without limitations, such as limited capacity, high temperature, and ease of explosion.
Okay, back to today's topic: how to properly charge your phone?
In fact, when charging lithium batteries in mobile phones, there is not much to pay attention to.
If you really want to pay attention, charge your phone when it's between 20% and 10% left!
And this percentage is mainly calculated based on lifetime of lithium battery.
Generally speaking, lithium batteries used in mobile phones can be charged and discharged approximately 500 to 1000 times.
This means that during lifetime of a lithium battery, about 500-1000 charge and discharge cycles can be completed, after which capacity of lithium battery drops to about 80% of its original capacity.
However, if you charge more to keep battery active to compensate for cell inertia, you can extend battery life.
According to test, it can be seen that activity of lithium battery is best when mobile phone is charged, when power is about 20%!
So in terms of charging, if you don't mind, it's best to charge your phone when it's between 20% and 10% left.
Okay, that's all for today, regarding batteries for mobile phones. See you next time.