Many people have encountered this situation: when swiping the bank card, they find that it is inexplicably demagnetized.
At this time, the person next to you may tell you: This is because you put your bank card and mobile phone together! The mobile phone emits a magnetic field, which accumulates and affects the bank card, and over time the bank card is demagnetized. Not only that, but the ID card will also be demagnetized, so the three of them must not be put together!
But is that really the case?
If you're familiar with the tech industry, you'll know that Apple has introduced an accessory in recent years: the MagSafe leather card bag.
According to Apple's official website, "The MagSafe leather card bag has a powerful magnet built in and can easily attach to the back of the iPhone, making it ideal for carrying ID and credit cards with you."
That is to say, even strict Apple officials believe that mobile phones, ID documents, and credit cards together will not be demagnetized, which is naturally a rumor!
Know what it is, and you must know why it is so. Let's talk about why they don't demagnetize.
First of all, bank cards are divided into two types: magnetic stripe bank cards and chip bank cards.
Image from "Daxing These Things"
The information of the magnetic stripe bank card is burned by the magnetic field, and there is indeed a case of demagnetization. But the premise of degaussing is that the magnetic field is very, very large.
Previous non-smartphone speakers were on the back of the phone, with a large magnet drive that did make it possible to degauss the magnetic stripe bank card. But now in the era of smart phones, mobile phone speakers are placed at the bottom of the mobile phone, one can not contact the magnetic stripe bank card, and the second is that the magnetic field is not so large, there is no demagnetization.
With the advancement of technology, the bank cards we do now are chip bank cards.
As above, a small yellow chip on the surface is a chip bank card
This kind of bank card is also called a contact IC card, the information inside is burned by the chip, rather than the magnetic stripe, naturally there is no degaussing this statement.
In fact, the SIM card in our mobile phone is also a contact IC card, it is always with the phone, so are you still worried that it will demagnetize?
In addition to bank cards, we commonly use cards such as campus cards, work cards, meal cards, subway cards and so on. Although I don't know if they are magnetic stripes or chip drivers, they can be safely placed together with the mobile phone and will not demagnetize!
Before there were small partners who were very exaggerated: he bought the GreenLink Bluetooth headset T3 before, and felt that it was very good in terms of sound quality and noise reduction! But because there is a small magnet on the lid, I am afraid that it will be demagnetized when I put it together, so I put one pants pocket for my mobile phone and headphones every time, and put another pocket on the card alone.
In fact, there are small magnets on the lid of the TWS headphones to make the headphones open and close better! And I myself am also using green link T3, hundred yuan price point, Hifi sound quality, I like it. But if you have to think about which pants pocket to put when you use it every day, isn't it because of choking?
My Green Link T3 headphones, be a model
Now that I know the principle, I am not afraid to put a trouser pocket!
Let's talk about ID cards.
ID cards, like chip bank cards, are driven by chips and have nothing to do with magnetic stripes, so in a word: no demagnetization!
However, it is interesting that our ID card is much thicker and harder than the average bank card, and do not touch the card reader when you usually use it, just scratch it on the top. Much more convenient than a bank card!
But also, think about the money you have to pay when you apply for a replacement ID card, you get what you pay for!
Despite this, some friends who love to put various cards and mobile phones together will still find that some cards are inexplicably demagnetized. What's going on?
Actually the pot is not on the phone. As mentioned earlier, the magnetic field of the mobile phone is too weak to dissipate the magnetism. But if you often put them next to home appliances such as induction cookers, refrigerators, microwave ovens, TVs, etc. that produce high-frequency electromagnetic waves, there is still a risk of demagnetization!
So the next time you degauss, don't throw the pot to the phone again. Jokes aside, if you deliberately don't put them together for this purpose, resulting in a lot of trouble to use, it is really not worth the loss!
Do you still know about the rumors that are widely spread in life? Welcome to share it with you in the comments section!