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Anonymous users2024-02-06The performance of the 18W, 20W and 65W chargers is not much different, they can be charged to more than 50% in half an hour, and it takes about 1 hour and 40 minutes to fully charge.
That said, although it supports 20W fast charging, there is no significant difference in charging time between the iPhone 12 using a 20W charger and an 18W charger.
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Anonymous users2024-02-05The difference between Apple 2A and 20W charging is what is the voltage of the withered battery, and the parameters provided by some mobile phone chargers are power parameters, and some mobile phone front base chargersThe parameters provided are current parameters, and the parameters marked by different brands of mobile phone chargers are different. 2A is the current, 20W is the power, these two are not the same thing, so there is no difference.
Generally speaking, if the 2A charging device reaches 20W, then the voltage is 10V. At present, the mainstream charging power is 18W and 20W, and the higher the power, the higher the heat.
The larger. <>
Electricity safety
The charger should look at the voltage and current, not just the power, otherwise the voltage is too high and the current is too large, which will cause damage to the electrical equipment, which is not conducive to electricity safety.
Theoretically, the maximum safe current is the rated current.
For example, if the mobile phone packaging says the current, then the maximum charger you can use, no matter how big it is, it will not be good for your mobile phone, and the voltage should not be higher than the rated voltage.
of chargers.
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Anonymous users2024-02-0418W, if you charge the phone, it is actually 5V, 12W, 18W, mainly compatible with the pad is 5V 3A. Therefore, charging a mobile phone 20W should increase the charging speed by 25% compared to 18W, and charging pad should not make much difference.
The charger is a charging equipment that uses high-frequency power supply technology and advanced intelligent dynamic adjustment charging technology.
Chargers (chargers) are divided into power frequency machines and high-frequency machines according to the working frequency of the designed circuit. The power frequency machine is designed based on the principle of traditional analog circuit, and the internal power components of the machine (such as transformers, inductors, capacitors, etc.) are larger, and there is generally less noise when running with a large load, but the model has strong resistance in harsh power grid environmental conditions, and its reliability and stability are stronger than that of high-frequency machines.
The high-frequency machine uses a microprocessor (CPU chip) as the processing control center, which burns the complicated hardware analog circuits into the microprocessor and controls the operation of the UPS in the form of software programs. As a result, the volume is greatly reduced, the weight is greatly reduced, the manufacturing cost is low, and the selling price is relatively low. The inverter frequency of high-frequency machine is generally above 20kHz.
However, the high-frequency machine has poor tolerance under harsh power grid and environmental conditions, and is more suitable for the environment where the power grid is relatively stable, the dust is less, and the temperature and humidity are suitable.
Compared with the power frequency machine, the high-frequency machine is small in size, light in weight, high in operation efficiency (low in operating cost), low in noise, suitable for office space, cost-effective (under the same power, **low), small impact on space and environment, relatively speaking, the impact (spike) and transient response (transient) caused by high-frequency chargers on copiers, laser printers and motors are easily affected.
Because the transformer of the power frequency machine isolates the mains power from the load, the power frequency machine can provide safer and more reliable protection than the high-frequency function in the harsh environment of the mains, and in some occasions such as medical treatment, the charger is required to have an isolation device, therefore, for industrial, medical, transportation and other applications, the power frequency machine is a better choice. The choice of the two should be weighed according to the customer's differences, installation environment, load situation and other conditions.
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There is an impact, because the capacity of MP4 batteries is very small, 500 mAh is much larger than 300 mAh, nearly twice as much, if you charge a 300 mAh battery with a 500 mAh charger, the battery will be charged, and sometimes it may be charged, the original charger It is designed for batteries, but don't worry, just use the charger you bought, and unplug the charger in time when you see it full. Estimate that your 500 mAh charger will charge a lot faster than your original charger ! Fast charging is not as good as slow charging!
Of course, it is more reliable, because his charger is not too expensive, so it is still relatively reliable.
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If only from the point of view of charging, the problem is not big, because the requirements for the data cable when charging are actually very low, only when it comes to the transmission of data, there will be high requirements, ordinary imitation wire, may be reduced in the transmission rate of data, but there is no impact on the service life of the mobile phone, the speed of the original Apple cable will be faster when transmitting data, and the ordinary imitation line may be a little slower.