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iPhone 17 Pro Max Overnight charging 5W or 20W?

T

tilhas

macrumors newbie
Original poster
Oct 5, 2009
23
5
At night I sleep 6-7hrs. So even if my new IPhone 17 Pro Max was at 1% charging using a 5Watt would bring it up to my 80% max charge limit.

I want to know if there is any advantages of using the original apple 5W or it worse?
My other option is the Apple 20Watt.

Thoughts?
 
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Unlike the old phones the 17s have a vapor chamber and made out of aluminum. With these changes the extra heat generated by the 20W or higher is no longer an issue. Also, it doesn’t charge at the full peak current till it’s full so whatever heat is generated only last for a few mins which is in turn dissipated quickly on the new models.

So my suggestion is to feel free to use 20W charger. Only thing to look out for is those think Otterbox cases that don’t let the phone breathe. Besides that, knock yourself out.
 
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Artemiz said:
Unlike the old phones the 17s have a vapor chamber and made out of aluminum. With these changes the extra heat generated by the 20W or higher is no longer an issue. Also, it doesn’t charge at the full peak current till it’s full so whatever heat is generated only last for a few mins which is in turn dissipated quickly on the new models.

So my suggestion is to feel free to use 20W charger. Only thing to look out for is those think Otterbox cases that don’t let the phone breathe. Besides that, knock yourself out.
Click to expand...
There is some wild speculation in here. The vapor chamber is connected to the processor not the battery.
And the max current charge is dropped only after reaching about 70% which takes ~ 30mins
 
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maerz001 said:
There is some wild speculation in here. The vapor chamber is connected to the processor not the battery.
And the max current charge is dropped only after reaching about 70% which takes ~ 30mins
Click to expand...
Not as wild as you think. The vapor chamber runs along part of the battery. Perhaps it helps with heat dissipation there as well.
 
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maerz001 said:
There is some wild speculation in here. The vapor chamber is connected to the processor not the battery.
And the max current charge is dropped only after reaching about 70% which takes ~ 30mins
Click to expand...
While I appreciate your enthusiasm in jumping to dismiss someone’s response as “wild speculation”, you’re ignoring a lot here.
The primary purpose of a vapor chamber is to pull the heat away from the hottest end (processor during active use). The same thing helps distribute the heat evenly while charging as well. It’s not designed to just keep the processor run cooler and let everything else be damned. This in conjunction with the aluminum construction dissipates heat faster.

Secondly, 30 mins is still just a few. I didn’t say it was only for a couple mins. OP wants to plug it in overnight and last I checked 30 mins is much smaller than that.

If you have any questions, I’m happy to answer.
 
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only magsafe charging ever since the iPhone 14, usually around 200 cycles when I trade in, always at 100% battery. 5W is doing little favors besides wasting time.
 
Artemiz said:
While I appreciate your enthusiasm in jumping to dismiss someone’s response as “wild speculation”, you’re ignoring a lot here.
The primary purpose of a vapor chamber is to pull the heat away from the hottest end (processor during active use). The same thing helps distribute the heat evenly while charging as well. It’s not designed to just keep the processor run cooler and let everything else be damned. This in conjunction with the aluminum construction dissipates heat faster.

Secondly, 30 mins is still just a few. I didn’t say it was only for a couple mins. OP wants to plug it in overnight and last I checked 30 mins is much smaller than that.

If you have any questions, I’m happy to answer.
Click to expand...
It’s still wild speculation that 20W is now fine and previously was not. How do you determine how many Watts are fine?
 
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OMG, my battery is degrading!!! 🙀 I won't be able to function today or sleep tonight because of the horrible anxiety this causes! Anything below 95% is totally unacceptable. I've spent hours researching this topic, bought the proper chargers, only charge to 80%, and set a timer so I don't accidentally over charge. Even if I fall asleep, the timer wakes me up so I can unplug. This is SERIOUS you guys. I don't understand how you aren't as stricken with worry about a degrading phone battery. And DON'T tell me it's free with AppleCare or $99 otherwise. NO! Absolutely not! I want the ORIGINAL battery, because once the phone is opened, it's RUINED! OMG you guys my phone battery, chargers, cables, I'm SO overwhelmed. I'm LITERALLY SHAKING right now!

/s
 
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klasma said:
It’s still wild speculation that 20W is now fine and previously was not. How do you determine how many Watts are fine?
Click to expand...
All (as in, 100%) of the battery conversations on MacRumors are speculation supported by made-up facts to enable busy-work and micromanagement of devices and systems that don't need our help. Need to charge? Charge it. Need to use it? Use it. Heat is normal. Do not subject phone to excessive, extremely high temperatures (think like in a locked car in the middle of summer) for extended periods of time. The end.
 
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cateye said:
All (as in, 100%) of the battery conversations on MacRumors are speculation supported by made-up facts to enable busy-work and micromanagement of devices and systems that don't need our help. Need to charge? Charge it. Need to use it? Use it. Heat is normal. Do not subject phone to excessive, extremely high temperatures (think like in a locked car in the middle of summer) for extended periods of time. The end.
Click to expand...
Also, avoid draining them to red.
 
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I feel like the software managing the charging should be able to recognise sleep charging and, if it is beneficial to the device, lower voltages during long-term sleep charging. It already communicates with the charger in all sorts of ways; I sometimes charge my iPad with a 140W charger and it sure doesn't pull that ;)
 
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Anecdotally, I ONLY used fast charging with my old iPhone. Like the Apple 20W, 140W, or an Anker GaN 65W (very nice brick).

I also kicked the snot out of that battery: oftentimes running it til shutdown, other times leaving it plugged in for hours at full, and every other situation in between.

Launch day 12PM original battery is hanging on at 78%.
 
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darkelipse04 said:
Not as wild as you think. The vapor chamber runs along part of the battery. Perhaps it helps with heat dissipation there as well.
Click to expand...
Perhaps, maybe, could be possible. Wild speculation. Just cos there is a cooling system designed for the processor reaches above the battery where it’s supposed to dissipate heat doesn’t mean that the battery gets cooled better. I would say exactly the opposite. But prove me wrong
 
The slower the charger - the better. Companies will never tell you this because it leads to them losing profits. 5W is much better for battery in long run. I mostly use old 5W, 10 or 12W Apple bricks to charge my iPhone, rarely I also use 15W Samsung charger.

It seems like phone charges much faster at 5W when it is turned off, not sure what is the reason. Heat during charging is also significantly reduced
 
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