When the phone is on its is always using the battery to keep the device running even whilst charging. So if you turn it off or at least turn off wifi/mobile data it will charge slightly faster. Hope this makes sense. Less work=less heat.
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iPhone 17 Pro Max Overnight charging 5W or 20W?
- Thread starter tilhas
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THIS.
Computing devices are tools, batteries are consumables. Enjoy your tools while they do what you expect them to do, if they don’t anymore, replace battery or get a new tool.
And if one is really so concerned about the last % of battery life/health, get AC+ and stop worrying. Enjoy the tool and life.
Literally does not matter, and don't let anyone tell you that it does.
I use a 5w charger from a Chromecast 2 and it works well.
What doesn't seems to work is the Optimized Battery Charging. It always just went to 100% straightforward. I know this because if I wake up randomly like 1-2 hours after connecting the phone, it just reached 100% without any delay or something like that. For example, going to sleep 10pm, waking up randomly at 12am when the next alarm is 4:30am..
Don't know if this is normal but meh, I don't really care
What doesn't seems to work is the Optimized Battery Charging. It always just went to 100% straightforward. I know this because if I wake up randomly like 1-2 hours after connecting the phone, it just reached 100% without any delay or something like that. For example, going to sleep 10pm, waking up randomly at 12am when the next alarm is 4:30am..
Don't know if this is normal but meh, I don't really care
Yours came with a charger? Interesting. Mine didn’t.
No you are. That is not how physics works. The VC is for only one use : distribute better heat generated by SoC. This does not apply for heat coming through battery.
If you want to go even deeper, 17 Pro / PM will go hotter quicker during hot days with sun exposure than previous Pro model despite many clueless "tech" Youtuber claiming the opposite. Better thermal conductivity meaning heat transfer are quicker : VC will cool the phone even quicker due to Alumininum thermal conduct under heavy SoC use - but the heat (or cold if very cold day) from outside will penetrate the device quicker too.
Some Chinese youtuber called HTX Studio pointed it out btw (they are infinitely better than US "tech" youtuber btw), you should check it out hands down best tech analysis of 17 Pro with Geekerwan video. VC has a very specific placement to manage heat distribution from SoC. Don't get me wrong VC is great and I am glad there is one to better exploit SoC power but it's not a magic component that prevent heat from other sources.
why so many of you charge at night while sleeping?
what if a charger overheats
what if a charger overheats
Why are you talking about sun exposure here? Are you assuming OP is sleeping on the streets? That is not the point of this thread at all nor did I mention anything about using the phone outside.
Pretty much everything I just said in the comment you responded to. Calling it wild speculation just because it goes against your thinking doesn’t make it so. Circle back in a few months with proof and I will stand corrected.
I didn’t say the vapor is going to pull the heat away. You won’t see the full benefits of VC for charging alone but it still helps distribute the heat better compared to one without. All you have to do is use a thermal camera and test it instead of using all your energy trying to prove me wrong. And I believe someone on r/iPhone already did.
No, I won’t.
I charge my phone using the 0.2w charger on my night stand, which is an inductive motor connected to a rotating wheel within which runs Harry, pet hamster, who helps keep my phone tippy-topped up by chasing the never-ending promise of a piece of apple that he can see but never quite reach.
I am a harsh taskmaster. The apple is a lie.
But on the plus side - 2700 cycles and my iPhone 6 is still at 97%, so there's that.
On a more serious note : The phone itself decides what power it draws, based on some fairly robust algorithms. If your phone determines it doesn't need 20w, it won't draw 20w. Your charger is not some sort of electronic beer bong, forcing juice into your phone against its will.
I am a harsh taskmaster. The apple is a lie.
But on the plus side - 2700 cycles and my iPhone 6 is still at 97%, so there's that.
On a more serious note : The phone itself decides what power it draws, based on some fairly robust algorithms. If your phone determines it doesn't need 20w, it won't draw 20w. Your charger is not some sort of electronic beer bong, forcing juice into your phone against its will.
Here's a graph from ChargerLab showing the different charge rates of various Apple chargers - as you can see, the system will intelligently throttle based on input voltage/current, measured heat, and charge level :
My point is VC is here to manage heat generated by SoC and nothing else. Sun exposure is with batteries the other main heat sources. Hence the comparison. Those two sources are equal on this topic : VC does not help, it’s not intended for those sources of heat because those heat transfers are drastically different.
Heat from battery is not focused on one specific spot. VC will not help.
Once again you don’t understand much about thermals. It’s ok to don’t know everything but being so rude and confident while having zero knowledge on a given topic is just wrong.
do you unplug all of your electrical appliances over night? refrigerator, washer, oven, computer etc etc
And Ozempic is here for type 2 diabetes but there are other benefits as well.
I never said it’s intended for that purpose either. If you’re gonna take things out of context or deflect to using the device in the sun, I’m done responding. Find someone else.
Stick to the 20W I feel like the 5W charger is too low for sufficient battery life
Just charge the darn phone and do not worry about the specifics unless you have a problem, which you will not.
You are turning around. We said your claim is speculation. Instead of providing any kind of evidence to support your claim you ask us to proof that your assumption is false.
Hang the phone inside an ice bucket. It will lower the temperature of the surrounding air further cooling the phone. /s
If I might ... throw some information out there that is hopefully useful...
The 80% claim comes from battery stats from sites such as below:
Some see 80% DoD as an acceptable tradeoff for longevity and not inconveniencing the user so much (I follow this and limit my phone to 80% because it doesn't inconvenience me at all).
Not only slower charging but also keeping the depth of discharge low can have a big impact on batteries - especially as they age.
Obviously, most people are going to get a new phone every few years, and some go to 5 years - so very few people see more than 500 cycles on their phones.
Heat is the #1 factor. Keep your phone cool as much as you can (don't leave it in a hot car, don't leave it in the sun, don't use some terrible wireless chargers that bake the battery).
Yes, slow charging has an impact, but it's very minimal. Depth of Discharge has a greater impact. And keeping the battery cool probably has the greatest impact.
I've read Isidor's book (from https://batteryuniversity.com) - great book on batteries if they're a hobby of yours like they are mine.
But most people here are also right... For $99 you can get a new battery - after 2 years my wife's iPhone 15 Pro Max had 84% health. For $99 she has a 103% health battery replacement and is enjoying her phone like it is new. She's a heavy user (had 550+ cycles in 2 years) and we were using a terrible Belkin wireless charger that took her phone to 105F+ while charging (got rid of that and she now has wired).
So use your phone, don't think about it too much, keep it out of the sun/car in the summer, and you're good!
The 80% claim comes from battery stats from sites such as below:
Some see 80% DoD as an acceptable tradeoff for longevity and not inconveniencing the user so much (I follow this and limit my phone to 80% because it doesn't inconvenience me at all).
Not only slower charging but also keeping the depth of discharge low can have a big impact on batteries - especially as they age.
Obviously, most people are going to get a new phone every few years, and some go to 5 years - so very few people see more than 500 cycles on their phones.
Heat is the #1 factor. Keep your phone cool as much as you can (don't leave it in a hot car, don't leave it in the sun, don't use some terrible wireless chargers that bake the battery).
Yes, slow charging has an impact, but it's very minimal. Depth of Discharge has a greater impact. And keeping the battery cool probably has the greatest impact.
I've read Isidor's book (from https://batteryuniversity.com) - great book on batteries if they're a hobby of yours like they are mine.
But most people here are also right... For $99 you can get a new battery - after 2 years my wife's iPhone 15 Pro Max had 84% health. For $99 she has a 103% health battery replacement and is enjoying her phone like it is new. She's a heavy user (had 550+ cycles in 2 years) and we were using a terrible Belkin wireless charger that took her phone to 105F+ while charging (got rid of that and she now has wired).
So use your phone, don't think about it too much, keep it out of the sun/car in the summer, and you're good!
I use the 5W charger for overnight, basically because I don't need the fast charging while sleeping.
I use the original Apple 5W block, plus an older standard USB to lightning cable and the lightning to usb-c apple adapter.
The extra longitude provided by the adapter is perfect for my needs, and also I can use the lighting cable alone to charge AirPods when needed ^^
I use the original Apple 5W block, plus an older standard USB to lightning cable and the lightning to usb-c apple adapter.
The extra longitude provided by the adapter is perfect for my needs, and also I can use the lighting cable alone to charge AirPods when needed ^^
Most people don’t have their phone drained down to zero or one or two minutes left. Always have some juice left when it’s placed on a charger at night and then after an hour, you have a whole lot more. No problem with emergencies. If you have to make a phone call that last 2 to 5 or 10 minutes, plenty battery left.