Why does a metal U disk leak electricity? In fact, our view is wrong. These currents are not generated on the U disk, but because of static electricity generated in the USB port of the host.
Next, let’s talk about the reasons why metal U disks leak electricity:
1. Metal USB flash drives are prone to leakage.
As we mentioned before, the metal USB flash drive is not insulated because of its shell, so when static electricity is generated, the entire USB flash drive will be charged. People mistakenly think that the USB flash drive is leaking electricity. If the host is working in an abnormal state and the USB flash drive uses a metal case, then when the user touches the USB flash drive, it is directly equivalent to touching the USB port. Because the USB flash drive was suspended in the air before, current would flow through the moment the user touched the USB flash drive, causing the user to get an electric shock.
2. How current is generated.
The current that users feel when being shocked by a USB flash drive is actually the static electricity generated by the motherboard in the host. A common cause of static electricity on the motherboard is that the motherboard is operating in two-phase power mode and is not connected to the ground wire. In this way, the long-term charges accumulated between the components in the motherboard cannot be released and accumulate on the USB flash drive, causing electric shock to the user.
3. U disk leakage will not hurt anyone.
Although there is an obvious tactile sensation when the user is hit by the USB flash drive, this is just an instantaneous current generated by static electricity, so it will not harm the user, but will only make the user feel abnormal in a moment. As long as electricity safety is ensured, there is actually no need to worry about static electricity on USB flash drives.
The above is why when we use a metal U disk, we occasionally feel an electric shock. These are not caused by the U disk, but by the static electricity carried by the host. If you don't want to encounter this "electric shock" feeling again, you can wrap the USB flash drive in an insulating sleeve or install a ground wire on the socket.