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mstgkillr

macrumors regular
Original poster
Feb 11, 2012
237
20
I have a a few 87W chargers for my RMBP. Will an 87W charger charge as fast as the 29W?
 
Not sure. I own the 60 watt version from the 13mbp and the required lightning to usb c cable and while it charges quickly I can’t really notice much of a difference compared to the iPad charger. However my iPad Pro does charge faster compared to the 10watt charger.

I think that the MacBook chargers are lacking the 14.5 volt PD mode hence it MIGHT not charge as fast as the 29watt charger that does have that mode.

https://gtrusted.com/how-the-apple-...w-usb-c-power-adapter-over-usb-power-delivery

However Apple states that you can fast charge with it; however doesn’t state the wattage that you can charge at hence it could be fast charging at 18watts (9 volts PD at 2 amps) or more.

https://support.apple.com/en-gb/HT202105

As I already had that charger (61 watt) I’m using it when at work & while travelling so I carry one less brick with me.
 
Fast charging on iPad Pro is 14.5V@2A = 29W.

Fast charging on iPhone is 9V@3A = 18W.

Only the 29W charger supports 14.5V@2A = 29W and thus is the fastest for an iPad Pro.

But all of Apple's USB-C chargers (and, in theory, any USB Power Delivery-compliant charger) support 9V@3A = 18W and so none are faster or slower than others for iPhones.
 
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Fast charging on iPad Pro is 14.5V@2A = 29W.

Fast charging on iPhone is 9V@3A = 18W.

Only the 29W charger supports 14.5V@2A = 29W and thus is the fastest for an iPad Pro.

But all of Apple's USB-C chargers (and, in theory, any USB Power Delivery-compliant charger) support 9V@3A = 18W and so none are faster or slower than others for iPhones.
Do you happen to know if the iPhone X can charge at 5v/3A?

Anker has a car charger with 3 usb and 1 usbc, port. The usbc port is 5v/3a, and the USB ports are 5v/2.4a. Wondering if there is any benefit in usbc in that case.
 
Fast charging on iPad Pro is 14.5V@2A = 29W.

Fast charging on iPhone is 9V@3A = 18W.

Only the 29W charger supports 14.5V@2A = 29W and thus is the fastest for an iPad Pro.

But all of Apple's USB-C chargers (and, in theory, any USB Power Delivery-compliant charger) support 9V@3A = 18W and so none are faster or slower than others for iPhones.

This is exactly the impression I’m under as well, but I’ve not seen the iPhoneX’s USB-PD supported charging profile published anywhere. I have a boatload of USB-PD chargers/battery packs from my Pixel XL days, and want to make sure I get the optimal setup.
 
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