Huawei mobile phone can not be charged with 12V
As for heating control, the traditional idea of fast charging technology is to increase the voltage to reduce the current, so that the heat can be controlled, but this way to voltage conversion, the traditional DC\/DC voltage conversion efficiency is not high, the lost energy will be dissipated into heat, resulting in charging speed will drop after a few minutes, so Huawei has not used 12V charging technology.
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In this 40W fast charge, Huawei used a capacitor charge and discharge 1\/2 voltage partial circuit in the Mate20 mobile phone, which is commonly known as the charge pump step-down circuit. The biggest advantage of this step-down method is that the voltage conversion efficiency is very high, close to 100%, and there is almost no energy loss, but the biggest disadvantage is that only half of the voltage can be output and there is no voltage regulation ability.
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However, this is not difficult to Huawei's SCP super fast charge protocol, their charging head can output twice the voltage to the mobile phone according to the requirements of the battery, and not just meet the requirements of the battery after 1\/2 step-down? This 40W charger can output any voltage between 3V-12V, perfectly dealing with the contradiction of low voltage charging voltage conversion efficiency and low voltage charging current. It is also perfectly compatible with 5V4.5A super fast charge and 9V2A fast charge standards, and can also continue to use the previous 5A charging cable.
It depends on the phone model and is generally rechargeable