This article is reproduced from IT House, IT House News on March 17th, the official WeChat public account of the China Association for Science and Technology, "Science China" yesterday, published an article to popularize the science of the correct mobile phone charging "posture", and it is recommended to charge the mobile phone first Plug the device into the power source and then into the phone.
The article first popularizes the knowledge called "surge", which refers to the instantaneous voltage that exceeds the normal operating voltage. Also called instantaneous pulse voltage, it is a short-lived current in the circuit that lasts for one millionth of a second and a violent fluctuation. The sparks that appear when our electrical appliances touch the power strips are called surges. Therefore, there are a large number of anti-surge power strips on the market. If you are using an anti-surge power strip, when charging the phone, it does not matter whether the data cable is plugged into the power or the phone first. If you are using an ordinary power strip, it depends on whether your charger is original or non-original.
When using the original charger, whether the data cable is plugged into the power source or the mobile phone is basically not affected; the result of the non-original charger is different. The moment the data cable is first plugged into the mobile phone, a relatively large voltage pulse will be generated. May cause harm to mobile phones.
Therefore, when charging the mobile phone, no matter what the power strip or the charger, the data line does not generate a pulse voltage before plugging in the power source, which is relatively safer. By the same logic, after the mobile phone is fully charged, the data cable must be unplugged from the mobile phone first, because the charger is prone to generate reverse instantaneous current when the charger is unplugged. If the data cable is not unplugged from the mobile phone first at this time Down, it may also damage the phone.
Therefore, when charging the mobile phone, IT house friends must remember: When charging, plug in the power first and then plug in the phone; when it is full, unplug the phone first and then unplug the power.