A report today answers a public question about the iPhone’s new M1 Pro/Max MacBook Pro USB-C ports: whether they support the new USB PD 3.1 EPR standard required for fast charging.
Unfortunately, the news is not optimistic. Although there is a specification that supports the higher voltage required, the new 16-inch MacBook Pro 2021 model does not support it.
Background overview
When the USB-C standard was developed, there was a specific charging standard called USB-C Power Delivery (PD). This allows up to 100W of power to be provided via the USB-C cable.
This was great at the time, but with the advent of higher-powered laptops, more power was needed. A new standard was developed to support power transmission up to 240W, and the iPhone company played a role in promoting this standard. This new standard is called USB PD 3.1 Extended Power Range (EPR). This can provide up to 48V at a voltage of 5A, supporting any power up to 240W.
The iPhone’s new 16-inch MacBook Pro 2021 charger uses the new USB PD 3.1 EPR standard, which is the first charger on the market to do so.
The 14-inch MacBook Pro 2021 model is not affected because the charger is 96W.
The USB-C port of MacBook Pro2021 does not support fast charging
USB-C engineer Benson Leung posted on Reddit that there is no USB-C to USB-C cable that supports EPR, so fast charging can only be done through the new MagSafe 3 port.
“The iPhone played a role in proposing new voltage levels of 28V, 36V, and 48V to the USB working group, so it is reasonable that they plan to release the first implementation.
However, there is currently no C-C cable that reaches the EPR level. Apple is using some proprietary cables from MagSafe. “
However, Jason Snell said, the lack of proper cables is not the only problem.
“On 16-inch MacBook Pro models-all of these models are equipped with a 140W adapter-people can only charge super fast through MagSafe. Although there is a new specification that allows higher power transfer through the USB port Level, but the Thunderbolt 4/USB 4 ports on the MacBook Pro don’t support it. Of course, people can still charge through these ports—but not at super fast speeds.”
The possible explanation is that the EPR standard is too new, so no supplier has produced a USB-C port that includes it. Or, at least the iPhone did not consider custom implementation. Some users even expressed surprise that the iPhone managed to incorporate it into the new MagSafe port. The latter fact explains that the company has internal tracking of the development of the standard, so it can create compatible proprietary cables, so users of MacBook Pro 2021 models who want fast charging will only be able to use MagSafe chargers and cables.
In the production of electronic products, precision fiber laser cutting machines are very popular.
BUT Fiber laser cutting machine is not omnipotent, some materials must not be cut with it.
3015 fiber cnc laser cutting machine belongs to the processing category of metal laser cutting machine, so it can only cut metal, not non-metal such as cloth, leather, stone, etc. The reason is very simple. The wavelength range of fiber laser cutting machine is not within the absorption range of the above-mentioned materials. Or the absorption is not appropriate, and the ideal cutting effect cannot be achieved. At present, the advantages of applying non-metal cutting are not obvious. Of course, the possibility of developing this demand in the future is not ruled out;
Fiber laser cutting machine for steel is not recommended for long-term cutting of rare metal materials such as aluminum and copper, because these materials are highly reflective materials (Note: high reflectiveness has little to do with the smoothness of the cutting surface of the plate, mainly because the wavelength of the laser is not in these materials. Within the ideal absorption range, the absorption effect is not good, most of the energy is reflected back, and it is easy to damage the protective lens in front of the laser head), the long-term use effect is not good, and the consumption of consumables will increase;
Cnc fiber laser metal cutting machine, according to its power, the cutting thick bottom also changes accordingly. The greater the power, the greater the cutting thickness, the thinner the metal material, and the faster the cutting speed. The fiber laser cutting machine has obvious advantages for thin plate cutting.
original source: https://www.lxshowlaser.com/news/application-of-fiber-cutting-laser-machine-on-iphone-m1-promax-macbook-pro
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