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USB Outlet Security FAQs
Time:2020-11-18    Read:1600 Time

The socket with USB has greatly facilitated people's daily life. You can charge your device in many places, such as at home, office, hotel or charge your device with just one charging cable.In order for you to better understand the impact of USB device charging on your device, we will answer some of the most common questions about USB charging and how to charge it safely and openly.

 NO.1 Will use USB socket to charge the device damage the device? 

The USB socket actually integrates an ordinary USB charger into the socket, which is no different from the USB charger used in our daily lives. The USB charger can provide the right amount of current (in amperes). The device itself is designed to only absorb the required current and cut off the current when the battery is full. This prevents the device from overheating or suffering any damage. Of course, when you buy a charger, you need to choose a high-quality product. Choosing a low-quality product may cause the charging voltage to be too high, causing the device to be broken down.

 NO.2 Can I use any USB charger to charge my phone? 

Generally speaking, mobile phone charging equipment is universal. (Except for some special charging equipment)

 1. Mobile phone chargers have been unified as follows: output voltage is 5V, output current ≥500mA. 

2. The output current of individual smart phone chargers is relatively large, which can exceed 500mA. But the rated output voltage of the charger is definitely the standard 5V

3. The voltage of the mobile phone battery is basically 3.6V (3.7V), and its maximum charging voltage ( the limit voltage of the battery) is 4.2V (4.3V). Therefore, a power management module is designed inside the mobile phone, and the power display, charging current control, and charging status display of the mobile phone are all displayed on the screen. 

But the charging speed of mobile devices only depends on two aspects: one is how much current the battery of the mobile phone needs to be replenished; 

Because some devices require more current to charge than others, you may notice that the charging speed is significantly different. For example, a smart phone can be charged normally at 1 ampere, while a tablet computer needs twice as much current as 2.1 amperes. 

Using a smart phone charger to charge the tablet means that it can only get half the power required, and you will need several hours to fully charge. On the contrary, you will find that your smart phone is charging much faster than usual. 

NO.3 Is it safe to always plug in the charger? 

If the charging cable is always plugged into the USB socket and not connected to a mobile phone or other device, no current will flow through the no-load data cable, and the USB charger is in a non-working state, which has no effect on the charger. However, there may be risks in the following situations: You use the charger in an overheated or humid environment, which may cause short circuit and sparks in the internal transformer 

1.You place the charger near flammable materials (furniture, wood, etc.). 

2.Charger is unqualified and poorly manufactured 

3.There is a problem with the general wall outlet or electronic equipment Due to these conditions, most of the cases are fires caused by plug-in chargers. Electronic manufacturers comply with very strict safety standards when manufacturing products to ensure that the risk of such fires is small. 

No.4 Is it safe to charge my device overnight? 

Generally speaking, devices like mobile phones are safe to charge overnight. The current mobile phone battery is a lithium ion battery, which is different from the previous one. The old mobile phone needs to be charged for more than ten hours after it is newly bought, but now it is not used, it can be charged at any time because it has no memory function. Most smart phones have a protection function. When the phone is fully charged, it will automatically stop charging to protect the phone's lithium battery. And when the charging capacity reaches more than 95%, it starts charging with a small current. 

However, if the mobile phone is charged for a long time without unplugging the power source, the mobile phone will be in a high voltage state, which will shorten the service life of the mobile phone battery. 

However, you will hear advice from many sources, warning you not to charge your smart phone and other gadgets while you sleep, just in case a fire breaks out and you need to evacuate quickly. 

NO.5 If I use a public USB wall outlet, is it possible to steal data? 

Many people will encounter the situation that their mobile phones are out of power when they are out. Fortunately, many public places, such as airports, hospitals, railway stations, etc., have public chargers, but do you know? IBM security experts said that online criminals will use the USB sockets in our public places to steal personal data. They can easily modify the USB sockets and install special software that can steal personal data including banking information. 

Public USB charging stations may be very useful for everyone, but they are not necessarily safe. When we plug the transmission line into the socket with hands and feet, your phone will connect to the installation drive that initiates a data copy or installs a virus program in the device. They quickly obtain our personal information, including bank accounts, SMS, Photos, contacts, etc., this technique is called "charging trap". So if we are really unable to charge in the public charger in an emergency, we need to pay attention to the following points.

 1. Do not use the charging data cable that comes with the public place. Many people see that the data cable is suitable for their charging socket and plug it directly in to charge. It is best not to use the public data cable, try to use your own data cable. 

2. If there is a power bank, use the charging cable of the public production center to charge the power bank first, and then charge your mobile phone, which will be much safer. 

3. When charging your own mobile phone in a public place, after the Apple mobile phone is connected, it will pop up whether the settings and data are trusted, and refuse any connection or trust. Android phones should turn off the USB debugging mode before charging.

4. For the sake of mobile phone safety, the easiest way is to turn off the phone while charging, and do not use it during charging. 

5. If you have to use it in public places, it is best to turn off the "cellular mobile data" (network), so as to prevent criminals from stealing personal information through remote control of charging viruses. 

If the above points can be achieved, charging mobile phones in public places will ensure information security. Have you learned it?

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