2. After each charge and discharge cycle, the power of lithium battery will decrease a little, and it will decrease to 80% after 400 times of charge and discharge. The so-called one-time charge-discharge cycle refers to complete charge-discharge, that is to say, if you use 20% of electricity, you will be fully charged, and it will take five times to calculate a charge-discharge cycle.
3. Because there is a chip in the battery to calculate the amount of electricity, in order to calibrate, a complete heavy discharge should be done once a month (that is, no electricity is needed when it is fully charged).
4. As long as you use Apple's official power supply, it will become a direct power supply mode after being fully charged, and there is no overcharge problem.
5. The charging process of lithium battery is that the first 80% can be completed by fast charging for 2 hours and the last 20% can be completed by continuous charging for 2 hours. This is normal, there is no need to do anything special.
So to sum up, the battery maintenance of iPhone is very simple. In addition to the following precautions, you only need to calibrate once a month, and try to use the power connection (for example, in the office), so there are no other precautions. What should be prevented from being overcharged and always charged (or never charged) should be misunderstood.
Power saving skills of iPhone battery
1 and 3G consume the most power, so the reason why iPhone 3GS can use 1 day or more is that 3G functions are hardly used. Using 3G functions consumes twice as much power as using wifi to play games and surf the Internet, and three times as much as making phone calls.
2. When it is not needed, try to turn off the push and the software regularly check the network function.
3. Turn off one or more Bluetooth functions of 3GWifi when not needed.
4. Internet search consumes a lot of power. Please turn off the 3G function in areas with unstable 3G signals and adjust to flight mode in areas with unstable telephone signals.
5.GPS consumes a lot of power, so don't start the software with GPS function.
6. Starting the equalizer while listening to songs will increase power consumption. You can turn it off if you don't need it.
Supplement: Lithium battery is afraid of heat, so try not to let it work above 35 degrees. Especially don't charge in this case, otherwise it will quickly reduce the battery power. Therefore, when you are in the car, you should avoid staying in the car or directly exposing yourself to the sun in summer. If your iPhone has started to burn, please turn it off and cool before recharging. In addition, it is suggested to charge and discharge once a month in order to calibrate the control chip on the battery, instead of amplifying the power like the nickel-hydrogen battery.