January 1, 2025, is the date for mobile phones and other small electronic devices. Saudi Arabia announced a law to standardize charging ports for all...
It’s built into the connector. The connector isn’t just wires soldered to contacts; It’s a PCB with actual circuitry. When you plug a device in, it uses that chip to tell the charger how much power to send. Then the charger receives that signal, and sends the appropriate amount of power.
If the signal isn’t received, then the charger should only send the bare minimum amount that any device should be able to handle, for things like flash drives or peripherals. This is why some of the cheaper cables won’t charge your newer devices, because those newer devices need more power and the old cable isn’t negotiating a high enough power transfer.
It’s ironically one of the biggest complaints that people have about USB-C, because it causes a nightmare in regards to compatibility. Old cables and chargers are constantly being phased out as the standard gets developed for more and more power transfer. And that outdated equipment is still sitting on shelves, waiting to be bought. A cable or charger that you bought a month ago may not be compatible to charge a device that you buy today, because that unit is actually a year old and was phased out six months after it was manufactured and shipped, but has been on a store shelf ever since because a retailer bought a bunch and doesn’t want to write them off as a loss.
It means people are constantly re-buying the same gear at higher specs, simply to keep up-to-date with existing standards. And if you don’t re-buy everything then you have a hodgepodge mix of cables and chargers that all look the same and only some of them will charge all of your newer devices. The older stuff looks the same on the outside, but your new phone will refuse to charge when you try to use them.
That’s not really true. The E-Marker in the cable does not do the negotiations. Its involved in it but its not as complicated as you make it sound. There are a total of 3 different completely backwards compatible cable types in regards to power delivery: 60W , 100W (which is legacy) and 240W. And most devices that could use a 240W cable will work just fine using a 60W cable but just charge a bit slower.
S22. Not sure what wattage level I get, but the phone will throw up a message saying something like “low power detected, please check cable” and then it will estimate like 5.5 hours to charge from 22% to full.
The S22 charges at a maximum of 45W. That’s technically within the 60W limit that all USB-C cable can handle. I could not find how exactly how the charging works but it’s possible that they are doing something like 9V @ 5A and thus are requiring a 240W or 100W cable. However it looks like in this particular case it might not matter.
GSMArena says the Galaxy S22+ charged to full in 62 minutes on the 25 W charger and 61 minutes on the 45 W charger. The Ultra took 59 minutes on the 45 W charger and 64 minutes on the 25 W charger.
It’s built into the connector. The connector isn’t just wires soldered to contacts; It’s a PCB with actual circuitry. When you plug a device in, it uses that chip to tell the charger how much power to send. Then the charger receives that signal, and sends the appropriate amount of power.
If the signal isn’t received, then the charger should only send the bare minimum amount that any device should be able to handle, for things like flash drives or peripherals. This is why some of the cheaper cables won’t charge your newer devices, because those newer devices need more power and the old cable isn’t negotiating a high enough power transfer.
It’s ironically one of the biggest complaints that people have about USB-C, because it causes a nightmare in regards to compatibility. Old cables and chargers are constantly being phased out as the standard gets developed for more and more power transfer. And that outdated equipment is still sitting on shelves, waiting to be bought. A cable or charger that you bought a month ago may not be compatible to charge a device that you buy today, because that unit is actually a year old and was phased out six months after it was manufactured and shipped, but has been on a store shelf ever since because a retailer bought a bunch and doesn’t want to write them off as a loss.
It means people are constantly re-buying the same gear at higher specs, simply to keep up-to-date with existing standards. And if you don’t re-buy everything then you have a hodgepodge mix of cables and chargers that all look the same and only some of them will charge all of your newer devices. The older stuff looks the same on the outside, but your new phone will refuse to charge when you try to use them.
That’s not really true. The E-Marker in the cable does not do the negotiations. Its involved in it but its not as complicated as you make it sound. There are a total of 3 different completely backwards compatible cable types in regards to power delivery: 60W , 100W (which is legacy) and 240W. And most devices that could use a 240W cable will work just fine using a 60W cable but just charge a bit slower.
Ah… so that explains why I have two dozen USB-C cables and only like 5 of them will fast charge my phone.
What kind of phone do you have? All USB-C cables should be able to do at least 60W charging.
S22. Not sure what wattage level I get, but the phone will throw up a message saying something like “low power detected, please check cable” and then it will estimate like 5.5 hours to charge from 22% to full.
The S22 charges at a maximum of 45W. That’s technically within the 60W limit that all USB-C cable can handle. I could not find how exactly how the charging works but it’s possible that they are doing something like 9V @ 5A and thus are requiring a 240W or 100W cable. However it looks like in this particular case it might not matter.
https://arstechnica.com/gadgets/2022/02/the-galaxy-s22s-45-w-charging-doesnt-actually-improve-charge-times/