There are several possible causes and solutions
1. There are many background software, which consumes electricity. Solution: Turn off the background or empty the data before charging) 2 While playing. Solution: shutdown charging 3 data line, transformer is not original. Solution: See whether the data cable is original, the charging head is 2a or 0.5a4 you open is the performance mode. Solution: Change to normal mode in the system Settings 5 voltage instability. Solution: Find another outlet to use 6 the temperature is very low. Solution: The charging efficiency of conventional batteries will be low at low temperatures, such as outdoor in winter, you can cover the fuselage to room temperature
Factors affecting the charging speed of mobile phones
Mobile phones with large battery capacity take longer to charge
To discuss the speed of mobile phone charging, we must first understand how to calculate the charging time, the charging time can be calculated by a simple formula: charging time = coefficient (generally greater than 1)× battery capacity (mAh)\/ charging current (mA). That is, when the charging current is constant, the larger the battery capacity, the longer the charging time; When the battery capacity is fixed, the higher the charging current, the longer the charging time.
It can be seen that in order to meet the needs of people to use mobile phones for a long time, when the charging current remains unchanged, manufacturers increase the capacity of mobile phones, and people will charge their devices for a longer time.
In addition, in actual work, the current is determined according to the load (i.e., the phone) that is connected behind. As long as the phone needs as much current as it can, the charger can provide as much current. If the current required by the phone exceeds the upper limit of the current that the charger can provide, the charger will always output this maximum current. Therefore, at the same time as the battery capacity, the more current the phone itself can carry, the faster its charging time will be.
The charging specifications of the power adapter affect the charging speed
Now most brands of mobile phone standard chargers are standard 5V, but manufacturers generally will be equipped with different output current numbers according to battery capacity. If the voltage is the same, the difference between 0.5A, 1A and 2A chargers is like a single lane, two lane and four lane highway - every time the current doubles, the charge will also double in the same time. Therefore, when charging iPad with iPhone charger with maximum output current only 1A and iPad with original charger 2A, the charging time of the former is 2.1 times that of the latter under theoretical conditions.
Therefore, when charging the mobile phone, in order to ensure that the charging speed of the mobile phone is fast enough, you should try to choose the original charger or other brands of chargers whose output current is not lower than the original standard.
Poor quality data cable is the \"killer\" that slows down charging time
It is difficult for ordinary people to distinguish the difference between the data lines from the appearance, so all interfaces are consistent, and mixing is like routine, but the number of currents provided by different data lines may be different.
Many low-cost data cables look thick, but the internal core is very thin, or replaced by pure copper with aluminum. In addition, there may be hidden dangers in the contact material and welding of the inferior data line connector, and the above problems will lead to increased resistance, the standard data line resistance should be 0.5 ohms, and the inferior line may reach 3 ~ 6 ohms, and the charging efficiency will naturally decrease by 6 to 12 times.
Weather factors that are easily overlooked
Many people have such experience, mobile phones often encounter problems in the winter season can not charge, this may not be a mobile phone problem, but because the temperature is too low. Because most of the lithium batteries used in smart phones are set up with a low-temperature protection mechanism, the temperature is too low to lead to the deposition of lithium metal in the lithium battery, which no longer reacts chemically with substances, resulting in an internal short circuit of the battery, at this time it will not be able to charge or charge slowly. This problem can also arise when the temperature is too high.
According to Apple, the iPhone is most efficient at charging at 22 ° C. The situation is similar for Android phones, which also use lithium batteries. When the temperature is too low, we need to transfer the device to a warmer environment, when the lithium battery temperature exceeds the low-temperature protection threshold (iPad, laptop, etc., is generally 5 ° C, mobile phone is generally about 0 ° C), it can be charged normally. When charging the phone is hot, you can remove the phone shell or put it on a cool desktop to cool down to improve the charging speed. Therefore, the temperature is a more important external factor affecting the charging of mobile phones, and the appropriate temperature helps to improve the charging speed.
Proper charging techniques can help increase charging speed
Lithium battery will start lithium battery protection when the power is very low, at this time the phone can not be turned on, there is no reaction in the initial charging, and the charging time will be longer. A charged phone has to wait a long time to wake up the battery and turn off the protection. So try not to wait until the battery runs out.
As we all know, after the phone is turned on, various programs have been running, which will consume more electricity, and naturally drag the \"charging rate\". So try to turn off some apps and turn off the screen while charging. Of course, if you can shut down or switch to \"airplane mode\
In addition, some friends like to charge through the USB interface of the computer, compared to the charging method of plugging in the socket, which takes longer to charge. Under normal circumstances, the maximum output current of the front USB port of the computer is only 0.5A, and the charging speed is very slow. If you must use the computer USB interface to charge, you can use the computer rear USB port, because its current is more stable than the front port, charging speed is relatively faster.
1. There are many background software, which consumes electricity.
Solution: Turn off the background or empty the data before charging.
2 Play while rushing.
Solution: Power off and charge.
3 Data cable, transformer is not original.
Solution: See whether the data cable is original, the charging head is 2a or 0.5a.
4 is in performance mode.
Workaround: Switch to Normal mode in system Settings.
5 The voltage is unstable.
Solution: Find another outlet to use.
6 The temperature is very low.
Solution: The charging efficiency of conventional batteries will be low at low temperatures, such as outdoor in winter, you can cover the fuselage to room temperature
4, weak signal in mountainous or low-lying areas (no signal area). Solution: Go back to the city or climb up the Peak Road.
5. Start in battery protection mode or flight mode under low voltage. Solution: Replace the battery or turn off airplane mode
There are two reasons for the slow charging of Mi 9:
1, the charging speed limit when playing games, the charging rate is very slow. 2, the charging speed can not keep up with the power consumption speed, so it will lose power.