Open "Settings" - "Privacy" - "Diagnosis and usage" - "Select automatic transmission" (Note: if automatic transmission is selected on the same day, it can be seen the next day) - "Diagnosis and usage data" - find the option of "log aggregated latest date" in it, and then open it (such as today, June 21) - turn the page to the bottom, and then turn it up slowly,Find the data of "keycom. apple. snapshot. battery. maxCapacity/keyinteger1800/integer", where 1200 is the remaining power of my iPhone 4S
Method II
Some users may find the above method very troublesome. In fact, using the "Aisi Assistant" is also very convenient.
Connect your iPhone and click "Battery Details" to see the actual capacity of the battery. The 1195mAh shown here is little different from the 1200mAh in the above method.Is this method much simpler?
That's too true. The key is still the cost. What is the business pursuing?If the problem is not serious, it must be the lowest cost and the best. Otherwise, you should call yourself a businessman
Power generation law of solar cells: take no-load 18V battery panel as an example The light is strong and the voltage is low (the working voltage is 13V). The current is large and the output power is maximum. The light is weak and the voltage is high and the current is low. The output power is small until there is no current.
Therefore, the charging of the battery is limited by the current rather than the voltage. If the maximum current can pass through the battery, there is no need to control it. In the same way, the electrical equipment directly uses the solar panel to generate electricity. When the voltage is high, the current is low, and the internal resistance of the equipment can easily pull down the voltage, so there is no need to worry.
The capacity of the battery has been determined once it is produced, and the capacity=charging current * charging time. From this equation, the capacity is certain. The higher the current, the less time it takes, and the higher the charging efficiency. The battery has three polarization problems: 1. Resistance polarization: during battery charging, the positive and negative ions move towards the positive and negative plates respectively. The resistance in motion is called the internal resistance of the battery. The voltage change caused by the internal resistance is called resistance polarization.When the current passes through the internal resistance, it will generate heat. The greater the current, the more heat.When the charging stops, the resistance polarization disappears, and the heat will be greatly reduced. 2. Concentration polarization: during battery charging, the acid anion moves to the positive plate, and the hydrogen ion moves to the negative plate.The concentration of ions on the surface of the electrode plate is different from that far away from the electrode plate, which makes the electrolyte present polarization voltage. This polarization phenomenon will disappear immediately after the charging stops.As the chemical reaction absorbs heat when the battery is discharged, discharging the battery during the charging interval can reduce the temperature rise of the battery. 3. Electrochemical polarization: during the charging process of the battery, the external power source continuously obtains electrons from the positive plate of the battery and transports them to the negative plate, which makes the plate react with the electrolyte chemically. As the reaction speed is lower than the speed of electron movement, the negative ion charge on the surface of the negative plate gradually increases and the electrons gradually decrease, so that charge accumulation is formed on both the positive and negative plates,It forms a capacitor.The phenomenon that the speed of electrochemical reaction is lower than the speed of electron movement, which results in the rise of terminal voltage, is electrochemical polarization.This phenomenon will disappear quickly after stopping charging.
