Your phone's battery level.
How many are left? For modern people.
It's a "life-threatening" issue.
The Spring Festival is coming.
The mobile phone battery should be fully charged, but the safety issue cannot be ignored.
What the hell is.
What about the correct posture for charging the phone?
Mobile phone charging method: "multiple times less charge".
Every time you charge it, you have to charge it to 100, and keep the phone "full" at all times, so that you have a sense of security and are conducive to battery maintenance, is this really the case?
In fact, in the early years, the widely used rechargeable batteries, such as nickel-cadmium batteries, its raw materials are mainly nickel hydroxide and cadmium metal, when the power is not exhausted and not fully charged, the power during charging and power-off will become the maximum and minimum value of its power, resulting in a reduction in battery capacity. However, nickel-cadmium batteries have been gradually phased out due to heavy metal pollution, high weight, low energy density and other reasons.
Today's smart phones are mostly lithium-ion batteries, which have a higher energy density than nickel-cadmium batteries, and store more power under the same volume or weight; Even if you unplug it without a full charge, it won't make any difference. Precautions when using: Do not recharge when the power is out, do not overcharge, do not need to charge and discharge deeply every time. The lifespan of a lithium-ion battery is related to the charge cycle, and every time 100% of the battery is used, a cycle is achieved, and the more cycles are cycled, the more significant the battery life decreases.
Data from a lithium-ion study showed that after 250 cycles, the battery capacity deteriorated significantly. After 300 to 500 cycles, the battery capacity drops to 80% of its original size. Some data show that when the lithium-ion battery is deeply charged and discharged, the material structure of the positive and negative electrodes will be destroyed. Lithium-ion batteries, on the other hand, rely mainly on the movement of lithium ions between the positive and negative electrodes, and once there is less space to accommodate their activities, the battery capacity will be correspondingly lower. Therefore, compared with "full charge and discharge", "multiple times and less charging" is more suitable for the charging habits of current mobile phones.
Charging habits: Plug the plug into the power supply first
Then connect to your phone with a data cable
In China, the voltage used by residents is 220V, but the voltage of mobile phone chargers is often within 5V, and when charging mobile phones, the charger will convert high-voltage current through the transformer into low-voltage DC and then deliver it to the mobile phone.
If the charger is connected to the mobile phone and then plugged into the power supply, it can be regarded as directly connecting the mobile phone to the power supply, and the surge voltage may be output; On the other hand, the plug is plugged in first, it is already on, and the output has stabilized at about 5V, so that there is less of a surge voltage.
A surge is a transient overvoltage that exceeds the normal operating voltage. Most of the sparkling sparks seen by plugging and unplugging switches are surges, although the time is only one millionth of a second, but in the long run, it can bring a lot of damage to the mobile phone battery. When you plug in the charger and then connect your phone, this is almost never the case.
After completing charging, it is recommended to unplug the phone first. This is because at the moment of unplugging the charger, a reverse instantaneous current is also generated, which accelerates the aging of the battery. You can try to use the charger, charging cable and socket as one, when charging, the phone is "pasted", and when it is full, the phone is "discarded", so that the operation is much safer.
Power bank: Yes"Charge Cycle" effect,
It is recommended to "charge less many times".
As a mobile power supply, the power bank is very convenient to use, not only small in size and can be carried around, but also can maintain the normal operation of the mobile phone. At present, there are many power banks on the market that claim to be 20,000 mAh. But most mobile phones, including the *** version, have a battery capacity of less than 5,000 mAh.
In fact, the capacity marked by the merchant is mostly the capacity of the battery cell itself, that is, the sum of the power of multiple lithium-ion batteries in the battery. Due to the loss of power during the conversion process, the effective power that the power bank can provide to the mobile phone is lower than this data.
How many times can the power bank really be used? You need to check the rated capacity in the manual, which is the minimum dischargeable capacity tested in the laboratory. Evaluations show that some self-proclaimed 20,000 mAh power banks have a difference of 4,000 mAh between the largest and the smallest capacity. In addition, the power bank is also a lithium-ion battery, and its life will also be affected by the charging cycle.
Charging trivia
Anecdote: An unmatched charger will cause a short circuit in the battery and affect the service life
When using a fast charger, if the phone does not support fast charging, the fast charger will automatically adjust to the input power suitable for the mobile phone.
It is recommended to try to identify the regular brand when buying, don't be greedy for cheap, the configuration inside the copycat charger is likely to not identify the current and voltage required by the mobile phone, thus damaging the mobile phone.
Anecdote: Don't charge while playing
What really affects battery life is the sudden temperature rise caused by charging while playing. When playing high-spec games or using fast charging, your phone will get hot. According to a survey, even when not using a mobile phone, the increase in temperature will still accelerate the reduction of battery capacity.
To ensure safety, it is advisable to avoid "multitasking" the battery. In order to facilitate the heat dissipation of the phone, it is not recommended to buy a protective case that is too thick. At the same time, in order to avoid high temperatures, mobile phone charging should be carried out in a normal temperature environment as much as possible, and when the mobile phone is exposed to the sun or high temperature for a long time, the battery may be permanently damaged. If you find that the temperature of your phone is abnormal while charging, it is recommended to disconnect the charger in time.
Editor: Li Ling's information: Popular Science China.
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