Does the charger really pollute the environment?

Well... Hello friends, I'm the garbage king. Xiaomi 11 is the second mobile phone to cancel the charger, following the cancellation of the charger for the full range of iPhone 12, iPhone 11, iPhone XR and iPhone se (the second generation) in 2020. However, the practice of Xiaomi is not quite the same as that of iPhone. Apple is a one size fits all approach. No matter whether you have a charger or not, you have to add 149 yuan for extra purchase if you want. Xiaomi uses another way. Under the condition of keeping the same price, it introduces the standard version and the package version respectively. The standard version does not have a charger, while the package version has a charger, so users can choose according to the actual situation.

Since Mi 11, Xiaomi has bought a mobile phone without a charger. Although it is said that there are still some versions with chargers available, the actual market situation shows that the package version has been snapped up for a long time. A lot of people take advantage of this

So the following news appeared in the world:

Xiaomi 11 charger free scheme failed, only 5% chose not

Netizens claim to buy Xiaomi 11 suite version, refund 1 cent to buy a charger

Netizens reported that Xiaomi 11 and Xiaomi 65W Gan chargers have compatibility problems

So I can't help thinking: how harmful is the charger to the environment? Can mobile phone manufacturers directly refuse to cut it off for users where it should be standard? If you can't understand that buying a mobile phone doesn't come with a standard charger, you can imagine buying a computer instead. In the future, if you buy a Xiaomi computer without a power supply, and the user finds that the battery runs out, the computer will be scrapped. If you don't buy a power supply, you can only use it once and for all? This is obviously very funny. But before blaming the manufacturer, I'd better study how harmful the charger is to the environment. In fact, the power of the past mobile phone charger is not large, the circuit is not complex, the components are not much, and the materials do not need too much, so the cost is low, and the volume is small. Today's mobile phones generally support fast charging. The parameters of charging head are often tens of V and tens of a, and there are more applications of gallium nitride (GAN). Therefore, compared with the ordinary charging head in the past, the current mobile phone charging head is expensive, but it has small volume, large power and high energy density. Will it be the application of new materials that cause a lot of pollution to the environment, That's why mobile phone manufacturers are forced to give up standard chargers? So I simply inquired about the information of GaN

Gallium nitride is a kind of inorganic compound, chemical formula Gan, is a compound of nitrogen and gallium. It is a kind of direct band gap semiconductor. It has been used in light-emitting diodes since 1990. The structure of the compound is similar to wurtzite and its hardness is very high. Gan has a wide energy gap of 3.4 EV and can be used in high-power and high-speed optoelectronic devices. Gan dust is irritating to skin, eyes and lungs. The environmental health and safety aspects of Gan sources (such as Trimethylgallium and ammonia) and the industrial health monitoring of MOVPE sources have been reported in the review in 2004. Bulk GaN is nontoxic and biocompatible. Therefore, it can be used in electrodes and electronics of implants in living organisms( Wikipedia)

As for the gallium nitride Health Monitoring Research Report, we have also got a copy here. Here is a simple hyperstar disk direct link. You can take it if you are interested in reading it.

Thanks to scihub, foreign language materials can only be obtained by it now.

As for gallium, like aluminum, it is only absorbed in small amounts through the gut. Its toxicity is related to the species of organisms. When the concentration is higher than 750 mg / kg, it will show toxicity to human kidney. Experiments in mice have shown that gallium causes deposits of gallium, calcium and phosphate in the kidney, which clogs the lumen( This extreme situation is obviously impossible in reality, so I think gallium nitride charger is very safe and has little pollution to the environment.

However, the pollution of mobile phones to the environment is huge. Mobile phones contain a large number of harmful substances, including a series of persistent and bioaccumulative chemicals, known as PBTS. When burned or disposed in landfills, they cause harm to human health and the environment. PBTS exist in animal adipose tissue for a long time, even if the release is small, they can accumulate to toxic level in the food chain.

Mobile phones contain a certain amount of antimony, arsenic, beryllium, cadmium, copper, lead, nickel and zinc. Printed circuit boards also contain a large number of brominated flame retardants, which are harmful to human body and environment. When these elements are disposed of in landfills, burned in incinerators, or in some cases disposed of in recovery facilities, they are released into soil, groundwater, air, and surface runoff.

To sum up, in view of the above conditions, I think that compared with mobile phones, chargers have little impact on the environment, and even the environmental hazards caused by poor quality mobile phone charging lines and mobile phone packaging are higher than the production and sales of chargers. Compared with calling for environmental protection by not providing chargers to consumers, Xiaomi can try to practice the concept of environmental protection by replacing old mobile phones with new ones and not providing packaging boxes. Replacing old mobile phones with new ones can refer to the replacement service of Jingdong. Replacing old mobile phones with new ones within three years can be converted to 80% of the new price. In this way, my father's 6 meters plus 2000 yuan can directly replace 11 meters, which is both environmentally friendly and affordable, Isn't it beautiful?

This year, the P40 I bought for me is directly connected to JD's full coverage service. If any part of the mobile phone is damaged, it can be replaced unconditionally. If it is repaired for more than three times, it can be replaced with a new one, and it can also be replaced with an old one. Although I have never used this service and it is better not to use it, considering that the mobile phone cost 5000 to buy the P40, now I like it very much after I send it to my mother, Now it's much easier to use than the original mi note3, and the size of the mobile phone is not big, which is the most important. My dad now looks around the whole mobile phone market. If he doesn't want P40 domestic mobile phones, it's hard to find a mobile phone as big as MI6, so now he can only hardware K30 without pro. Fortunately, this mobile phone has a charger. Thank God. If you have a chance to send my dad a mate40, it will work. K30 is useless without pro. Pro and K30 are two mobile phones.

PS: in fact, the main reason why Xiaomi doesn't send chargers is that the 65W charger is too big to be packed into the mobile phone packaging box compared with the competing products. In fact, the 65W charger is not compatible with the mobile phone. The mobile phone itself can't bear such a large charging power, so it can only use 55W charger. But this will obviously become a public relations event, so I came up with this kind of apple to dig a hole, quickly jump in and be a step down. Environmental protection is just a cover, and the calculation is all business. I have to say that this operation is OK. Compared with praising the user as a loser and buying a mobile phone to send a charger, in fact, Xiaomi's operation is very simple. You can get a worse charger than you should normally have, and then think you've made money. This operation is really OK. I just don't know if Xiaomi's target customers (losers) will pay.