To exit the recovery mode, press and hold the HOME key+Power key at the same time until the white Apple logo appears on the screen.
Maintenance of mobile phone battery?
The maintenance of mobile phone battery should start from the first charge. The first charge has a great influence on the service life of the battery in the future. Generally, the first charging time is required to be 16 hours (if the battery is fully charged, it should be used up first), but remember not to exceed 24 hours, otherwise the battery may be fully charged. After charging, it is required to recharge after each use for about 5-6 hours each time. For a new battery, it needs to be charged and discharged many times to achieve the best use effect. ?
It should be pointed out that:
Do not charge the battery when it is half used or the used battery suddenly stops using for several months. The standard service life of a battery is one year. After one year of use, the battery can be discharged every two months, which has a good effect on prolonging the service life of the battery, but it is not necessary to recharge the new battery after each discharge. Finally, please note that the leaking battery should not be used again, otherwise the loss will outweigh the gain. ?
When charging the battery, use the original charger, and try not to use a charger that can charge multiple machines. Generally, mobile phones are equipped with travel chargers. If possible, you should use a seat charger. From the point of view that mobile phone manufacturers keep the function of charging directly through mobile phones, there should be certain technical guarantee. However, from the analysis of damaged components, the charging current is generally too large, which exceeds the load of the charging circuit in the mobile phone. The main reasons for this failure are as follows:
First, the voltage in many cities in China is unstable, especially at night;
Second, the battery quality is not good, or the battery power is used too hard. For mobile phone users, it is best to use fast charging as a temporary or emergency charging method at present, with seat charging as the main charging method. Because even if the latter method fails, it will not cause damage to the mobile phone itself. ?
If conductors such as jewelry, keys or beads come into contact with the exposed electrodes of the battery, these substances may make the current form a loop and become very hot, causing harm to people. In order to prevent accidental leakage, you should properly place the charged batteries and pay special attention to the batteries in your pockets and bags. After the battery of the mobile phone is removed, it should be put in a protective case. When the battery is not used for a long time, it should be placed in a protective sleeve and stored in a dry and dark place. Never put the cell phone battery at a high temperature (above 60℃), such as under a window with high temperature and direct sunlight. In addition, using lithium battery in low temperature environment may not guarantee the ideal standby and talk time of mobile phone.