Apple official document has suggested that using a higher wattage power adapter to charge iphone faster. Does anyone know how the protocol work? Does the power adapter send higher wattage directly to the iphone, or the power adapter has to negotiate with the iphone to agree on a higher wattage before the power adapter increase the wattage? If I charge other non-apple devices, do I still get faster charging?
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Other Power adapter to charge faster
- Thread starter cpthk
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The device being charged decides how much current to draw. If at some point the charger is unable to deliver more current, that’s it. The device doesn’t get any more. Using a charger rated for higher output means it can deliver more current before reaching its maximum. Higher current means moving more charge into the battery per unit of time.
The older iPhones listed in the article you linked all fast charge at 18w maximum, the newer iPhone 11 Pro actually supports up to 22.5w fast charging for the first 50% of battery charging only. The iPhone itself dictates what wattage it will pull from the charger so you can plug it into a 87w Macbook power plug but the iPhone 11 Pro can only pull 22.5w.
I linked the website below but this is the charging flow for the iPhone 11 Pro (assuming you are using a charger that is higher than 22.5w):
Charging from 0-50%: 22.5w full power
Charging from 50-75%: slowly drops from 17w to 10w
Charging from 75%-100%: slowly drops from 10w to 0w
www.chargerlab.com
I linked the website below but this is the charging flow for the iPhone 11 Pro (assuming you are using a charger that is higher than 22.5w):
Charging from 0-50%: 22.5w full power
Charging from 50-75%: slowly drops from 17w to 10w
Charging from 75%-100%: slowly drops from 10w to 0w
iPhone 11 Pro Max Charging Test
After years of shipping a 5W charger in the box with iPhones, Apple finally decided to include an 18W fast charger with the iPhone 11 Pro, along with a USB-C to Lightning cable because you need both to fast charging your iPhone 8 or later. Unfortunately, the more affordable iPhone 11 continues to co
www.chargerlab.com
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The AC power brick you plug into the wall isn't the charger. It's a voltage regulated power source (5 volts for iPhones). The charger is built into the iPhone. You could plug a lightning cable into a 5000 watt USB power source and the iPhone would charge normally.
Where a potential issue arises is when a cheap aftermarket AC wall power source doesn't have a controlled regulated voltage - High voltage could damage the iPhone
Where a potential issue arises is when a cheap aftermarket AC wall power source doesn't have a controlled regulated voltage - High voltage could damage the iPhone