In other words, the magnetic field strength (rather than the number of magnets) carried by an iPhone 12 series smartphone, that is, the mobile phone equipped with MagSafe is placed next to the Medtronic pacemaker, may cause the operation of medical equipment to fail. Although Apple declared in the official supporting documents that "it will not pose any risk to medical equipment", if the conclusion of this medical research is true, the magnetic field intensity generated by MagSafe is beyond people's imagination.
Knowing that a strong magnetic field may bring harm to people, why does Apple use MagSafe accessories?
Let's first understand what MagSafe is. MagSafe is actually a magnetic connection technology of Apple. Its interface has a magnetic attraction device, which automatically absorbs or falls off under the action of external force. This accessory is attached to the back of the mobile phone by magnetic attraction, so as to complete the identification of accessories by the mobile phone and perform wireless charging and other functions. Such as mobile phone case, pickup case, wireless charger, etc.
In fact, the accessories listed in iPhone 12 have appeared in the magnetic charging interface of Magsafe before on the MacBook, and this time they appear directly in the accessories of iPhone 12, indicating that this technology is favored by consumers, or it is an innovation that Apple is proud of.
What's the problem? How high is the electromagnetic radiation that will affect human health?
Internationally, electromagnetic radiation has been listed by WHO as the fourth largest pollution source after water, atmosphere and noise. Long-term excessive exposure to electromagnetic radiation will do harm to human reproductive, nervous and immune functions. It is also easy to induce dermatosis, diabetes and cardiovascular diseases. According to Swiss regulations, it is no problem for people to live in an environment of 2 milligauss, while the requirement of magnetic field strength in China is that it cannot exceed 100 microtesla.
In the absence of artificial radiation sources such as wires, televisions and mobile phones, the normal magnetic field strength in nature is 0. 1- 1 milligauss. Gauss (Gs, G) is a non-international unit of magnetic induction intensity or magnetic flux. It was named in memory of German physicist and mathematician Gauss. Tesla is the unit of magnetic induction intensity, which refers to the number of magnetic lines perpendicular to the direction of magnetic lines per unit area. Also known as magnetic flux density, also known as magnetic flux density, expressed by B, the unit is Tesla (T).
Their relationship is: 1 Tesla = 10000 gauss.
However, there is no evidence to prove whether the long-term accumulation of low-intensity electromagnetic radiation has an impact on the human body.
Is it necessary for consumers to buy Magsafe introduced by Apple with iPhone 12?
First of all, it must be clear that Magsafe launched by Apple is essentially a mobile phone accessory, and whether to buy it depends entirely on personal needs. Apple didn't say it must be bought. If you don't need the official experience of magnetic charging, mobile phone case and pickup case, you don't need to buy these accessories. On the contrary, if you are very interested in magnetic wireless charging, you can buy Magsafe wireless charger. You can also buy Magsafe leather card holders. Therefore, Magsafe is not a necessary accessory, and whether it is necessary depends entirely on personal needs.
Therefore, although Magsafe can produce strong electromagnetic radiation, there is no evidence that it is harmful to human health. Therefore, whether magnetic attraction is needed really depends on personal preference.