Got a tip for us?
Let us know
Become a MacRumors Supporter for $50/year with no ads, ability to filter front page stories, and private forums.
Other Fast charging
- Thread starter kat.hayes
- Start date
- Sort by reaction score
I think it all comes down to the specification the manufacturer built the battery. They made it charge that fast.
My wild guess would be that fast charging might cause some slight deterioration, but nothing worth worrying over. Same deterioration could be caused just by living in a very warm climate.
As to be expected. The 7 Plus does not support Fast charging, you might as well use the 10 or 12W iPad charger with standard Lightning to USB-A cable.
Which phone?
Not trying to dissuade anyone from doing their own experiments, but I have a power draw meter, along with all the iPhones/iPads/bricks/cables, and the results have been consistent:
Using both the Apple 29W and 61W (and presumably the 87W) charger and Apple 1m Lighting to USB-C cable, the 8 Plus was successfully able to negotiate 1.2A @ 15V for an ~18W power delivery. This is in contrast to my standard iPhone 8, which can do 2.4A @ 5V for 12W power delivery. The iPhone 8 with USB-C charger/cable charging is just marginally faster than an iPad 10W or 12W charger + standard USB-A to Lightning cable.
NOTE: these “Fast charge” rates are only obtainable when the battery is <50%. Above that rate, the draw will slow down significantly, reduced to 5-6W when passing 80%.
If you go into settings/general/regulatory on 8 plus you will see the USB pd supported
Last edited:
Ah yes sorry it's the 8 Plus.
Btw I will conclude my test this weekend. Also will include (fast) wireless chargjng times.
wireless charging on iphone is slow speed (5w) , it will be enabled fast (7.5w) in the future via software update.
Anyone tried any of these multi port desk chargers:
Zerolemon 75W
https://www.amazon.com/Charger-Zero...&qid=1507293793&sr=1-1&keywords=zerolemon+75w
Grandstart 75W
https://www.amazon.com/Grandstar-Ch...e=UTF8&qid=1507293857&sr=1-27&keywords=usb+pd
They seem to be identical and I love the idea of having QC 3.0 and USB PD into one.
Zerolemon 75W
https://www.amazon.com/Charger-Zero...&qid=1507293793&sr=1-1&keywords=zerolemon+75w
Grandstart 75W
https://www.amazon.com/Grandstar-Ch...e=UTF8&qid=1507293857&sr=1-27&keywords=usb+pd
They seem to be identical and I love the idea of having QC 3.0 and USB PD into one.
I just ordered this (it was announced yesterday by Anker) - https://www.amazon.com/Anker-PowerC...id=1507295833&sr=8-1&keywords=anker+20000+18w
Claims to do 18W output for the iPhone 8+. Anyone have a reliable USB meter they recommend to test this? I bought one but then saw in the comments how it doesn't work with rapid charging so I cancelled the order.
Anyone think this will work?
Claims to do 18W output for the iPhone 8+. Anyone have a reliable USB meter they recommend to test this? I bought one but then saw in the comments how it doesn't work with rapid charging so I cancelled the order.
Anyone think this will work?
Last edited:
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
You should cancel that Anker Powercore, too,
It only delivers 18W via USB-A. And the iPhone 8 Plus can only take 18W via Lightning to USB-C connection.
As an Amazon Associate, MacRumors earns a commission from qualifying purchases made through links in this post.
Wow, so it is no different than a normal 2.4a 12w... Ugh.
An iPhone (even an 8 Plus) won't even pull 2.4A @ 12W from USB-A, more likely 2.0A @5W
The lightning cable can't be limited to 5 watts? So when Anker says it can do 18W via USB .... ???? I know the iPhone 8+ has USB 3.0 so the cables are capable of 3.0 throughput.
You'd think if it would draw 18W through a USB PD cable, it could do it through USB 3.0.
Edit:
https://www.digikey.com/en/articles...c-and-using-power-delivery-for-rapid-charging
You'd think if it would draw 18W through a USB PD cable, it could do it through USB 3.0.
Edit:
https://www.digikey.com/en/articles...c-and-using-power-delivery-for-rapid-charging
Last edited:
A USB-A Lightning cable is not limited to 5W, it can deliver 12W to some iPads and 10W to most iPhones (at <50% battery).The lightning cable can't be limited to 5 watts? So when Anker says it can do 18W via USB .... ???? I know the iPhone 8+ has USB 3.0 so the cables are capable of 3.0 throughput.
You'd think if it would draw 18W through a USB PD cable, it could do it through USB 3.0.
Edit:
https://www.digikey.com/en/articles...c-and-using-power-delivery-for-rapid-charging
Note that the USB PD 3.0 spec your reference in the table above, can only be supported via USB-C interface on both the charger and the receiving device. Which is why only Apple's iPhone 8/8 Plus, along with the 10.5" and 12.9" iPads support >12W charging. They each have a USB-C PD chip/interface.
Ok great - thank you for taking the time to help me see that. This is an area I don't know a lot about. I appreciate it.
Finished my test with the official Apple 12W ipad charger this evening. Below are the stats and comparison with the official Apple 29W usb-c charger + usb-c to lightning cable. Start at 5% battery level, wifi on, screen off.
Last edited:
to be abble to charge 8+ with 18w, you need an usb-c charger that does can switch to 14.5 - 15 Volts and supply at least 1.2 Amps. Using 9V ones the input is around 12-14W