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iPhone 13 Pro Max 13 Pro Max Battery Capacity dropped already

Pro_the_legend said:
Lol, my 12 Pro Max is exactly 364 days old today, and its at 80% battery health with 345 cycles, and Apple says its 'in good condition'. They won't replace it unless its at 79%.

They used cheap quality batteries in the 12 series, people just upgraded rather than complain, Apple figured out another way to skimp on costs. Seems like they did the same on the 13 series. Now this will be the norm, with batteries needing to be replace once a year. Ridiculous.
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My 12 Pro is now at 92% and had for 14 months. I guess it depends on your usage that determines how much battery depreciation shows.
 
3Rock said:
My 12 Pro is now at 92% and had for 14 months. I guess it depends on your usage that determines how much battery depreciation shows.
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Mine hit 79% a day after my one year warranty, I paid full price and got a new battery.
 
toomasjoamets said:
Thing I have noticed among many iPhone users is that when they send or post screenshots, then you can see that in many cases battery is almost depleted. I have asked some of such people, that I personally know, why they do it. They say they are conserving the battery by letting it completely discharge and then recharging it with slow, overnight charge.

So let's quote Luke Skywalker here... “Impressive — every word in that sentence was wrong.”

That all was true for NiMH batteries, which iPhone is NOT using. iPhone is using modern Lithium batteries. These are not even old Lithium-Ion batteries, the tech has evolved a lot in time.

First of all, Lithium batteries don't have memory effect what so ever. So completely discharging and then fully charging has no meaning at all.

Secondly, the perfect charge is between 50-80% in which the battery is in such chemical state that aging is the slowest. iPhones even have this optimized charging, when you leave it for overnight charge then it charges to 80% and then waits and charges to 100% by the time you usually start using it. Sitting behind your desk and charge has dropped to 49% and you have charger at you hand? Perfect, plug it in.

Thirdly, slow charge is not good for Lithium batteries. Charging stresses the battery chemically over the time it takes it to charge. Fast charge is not bad, high temperature is bad. The faster the charge, WITHOUT creating excess heat the better it is! But remember, Lithium battery is chemically more active, when the temperature is higher. So some heat is actually good, to the point, when it does start to degrade the battery. But don't worry, that point is not where you say "my phone is warm", it's the point where you would say "the phone is super hot, I can't hold it in my hand".

Urban legend: Is wireless charging bad?
No it is not. You have several circuits and controllers between the wireless charger and the battery. For the battery, the phone is the source of the charge current. The phone takes the power from cable or the wireless charger and converts and directs it to the battery.

Bad thing about wireless charging is that if you don't have matching size coils and/or they are not perfectly aligned, then it creates a lot of heat just next to the battery, which itself will heat during the charge. So let's scroll up a bit. Too much heat is bad. But here comes MagSafe. The coils match and magnets keep it perfectly alligned, so it doesn't generate basically no heat at all.

So I've been living according to these principles and the result?

1.5 years old iPhone 11, 100% battery health
0.75 years old iPhone 12 Pro Max, 100% battery health (it has been used with MagSafe all the time)
1.5 years old Apple Watch SE, 99% battery health (but consider it's a very small battery that will degrade much faster)
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Thank you so much for that reply, really insightful! Busts some theories as well!
 
toomasjoamets said:
Thing I have noticed among many iPhone users is that when they send or post screenshots, then you can see that in many cases battery is almost depleted. I have asked some of such people, that I personally know, why they do it. They say they are conserving the battery by letting it completely discharge and then recharging it with slow, overnight charge.

So let's quote Luke Skywalker here... “Impressive — every word in that sentence was wrong.”

That all was true for NiMH batteries, which iPhone is NOT using. iPhone is using modern Lithium batteries. These are not even old Lithium-Ion batteries, the tech has evolved a lot in time.

First of all, Lithium batteries don't have memory effect what so ever. So completely discharging and then fully charging has no meaning at all.

Secondly, the perfect charge is between 50-80% in which the battery is in such chemical state that aging is the slowest. iPhones even have this optimized charging, when you leave it for overnight charge then it charges to 80% and then waits and charges to 100% by the time you usually start using it. Sitting behind your desk and charge has dropped to 49% and you have charger at you hand? Perfect, plug it in.

Thirdly, slow charge is not good for Lithium batteries. Charging stresses the battery chemically over the time it takes it to charge. Fast charge is not bad, high temperature is bad. The faster the charge, WITHOUT creating excess heat the better it is! But remember, Lithium battery is chemically more active, when the temperature is higher. So some heat is actually good, to the point, when it does start to degrade the battery. But don't worry, that point is not where you say "my phone is warm", it's the point where you would say "the phone is super hot, I can't hold it in my hand".

Urban legend: Is wireless charging bad?
No it is not. You have several circuits and controllers between the wireless charger and the battery. For the battery, the phone is the source of the charge current. The phone takes the power from cable or the wireless charger and converts and directs it to the battery.

Bad thing about wireless charging is that if you don't have matching size coils and/or they are not perfectly aligned, then it creates a lot of heat just next to the battery, which itself will heat during the charge. So let's scroll up a bit. Too much heat is bad. But here comes MagSafe. The coils match and magnets keep it perfectly alligned, so it doesn't generate basically no heat at all.

So I've been living according to these principles and the result?

1.5 years old iPhone 11, 100% battery health
0.75 years old iPhone 12 Pro Max, 100% battery health (it has been used with MagSafe all the time)
1.5 years old Apple Watch SE, 99% battery health (but consider it's a very small battery that will degrade much faster)
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What a great first post. 👍🏼
 
Taz Mangus said:
Turn on Low Power Mode during charging. Now you can use your iPhone while it charges. Also, keeps the phone running cooler during charging.
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I like the way the following occurs when it reaches 80% charge. Screen lights up with the attached notification. Wasn’t aware of this.
EB66AB61-1EF5-4EDC-8B38-9FF1445812B8.png
 
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Reactions: Taz Mangus and Daniel Narciso
My 13 pro is down to 98% already. When I sold my 12 pro after a year of ownership it was at 82%. Apple either started using cheaper quality batteries with the 12's or magsafe charging has an impact on battery life.
 
reyalP said:
My 13 pro is down to 98% already. When I sold my 12 pro after a year of ownership it was at 82%. Apple either started using cheaper quality batteries with the 12's or magsafe charging has an impact on battery life.
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Wireless charging does generates heat which can affect the battery adversely.
 
reyalP said:
My 13 pro is down to 98% already. When I sold my 12 pro after a year of ownership it was at 82%. Apple either started using cheaper quality batteries with the 12's or magsafe charging has an impact on battery life.
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Definitely cheaper quality batteries. I never use wireless charging on it, mainly charging through cable charging. I am also at 82% and had it since launch on my 12 Pro Max.
 
I've always used wireless charging and never noticed a battery health degradation like this until I started using magsafe charging on my phone.
 
George Dawes said:
I've noticed dramatically lower battery life since the last few ios updates , looked up battery use , nothing bad popped up .. bizarre

If it keeps up like this it'll be the last big iPhone i buy
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iOS 15.2 actually improved the battery life on my launch day 13 Pro Max. I was pleasantly surprised given how impressive the battery life was with 15.1.
 
Taz Mangus said:
iOS 15.2 actually improved the battery life on my launch day 13 Pro Max. I was pleasantly surprised given how impressive the battery life was with 15.1.
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So I bought my 13 pro max in November started off using 20w charger saw battery health drop 99% then tried using 5w same charging habits as my 11 pro max after 2 yrs sold it with 98% battery health but I am
Also on 15.1.1 I heard 15.1 had call dropping issues never experienced it since I just got the phone and it came with 15.1 so I updated do you think 15.2 or newer would fix that issue seems software isn’t reading correct?
 
Gamemulator said:
So I bought my 13 pro max in November started off using 20w charger saw battery health drop 99% then tried using 5w same charging habits as my 11 pro max after 2 yrs sold it with 98% battery health but I am
Also on 15.1.1 I heard 15.1 had call dropping issues never experienced it since I just got the phone and it came with 15.1 so I updated do you think 15.2 or newer would fix that issue seems software isn’t reading correct?
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I highly doubt your battery health will go back up again. And I don’t think it is a software bug. Hard to say what causes the drop on battery health. My suggestion is to install the Mac app CoconutBattery, connect your phone via Lightning cable and see what the more accurate battery health of your phone. Might want to consider installing iOS 15.3.
 
toomasjoamets said:
Thirdly, slow charge is not good for Lithium batteries. Charging stresses the battery chemically over the time it takes it to charge. Fast charge is not bad, high temperature is bad. The faster the charge, WITHOUT creating excess heat the better it is! But remember, Lithium battery is chemically more active, when the temperature is higher. So some heat is actually good, to the point, when it does start to degrade the battery. But don't worry, that point is not where you say "my phone is warm", it's the point where you would say "the phone is super hot, I can't hold it in my hand".
Click to expand...

this is the first time ever i read this thing: the "bro internet science literature" says the opposite. Any reference in support of your statement?

However, it make absolutely sense to me. I've always used the 5w charged with the (wrong?) belief that was good for my battery. Everywhere they say the slower the better, but probably because the fast charging is associated with more heat.

@Taz Mangus do you agree? :cool:

I'll switch to 20w original charger now for some days and test the mAh variations with coconut.
 
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People are free to do and believe whatever they want. I am sticking to the 80/20 rule using wired charging with a 12 watt charger. My launch day 13 Pro Max is still at 102% battery health. I also use a HomeKit smart plug that shuts off when the battery reaches 80%. I can charge over night and not worry about the phone sitting on the active charger.
 
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Taz Mangus said:
People are free to do and believe whatever they want. I am sticking to the 80/20 rule using wired charging with a 12 watt charger. My launch day 13 Pro Max is still at 102% battery health. I also use a HomeKit smart plug that shuts off when the battery reaches 80%. I can charge over night and not worry about the phone sitting on the active charger.
Click to expand...

i wasn't aware of the 12w charger. I think it's a better choice instead of 20w.
 
Taz Mangus said:
I highly doubt your battery health will go back up again. And I don’t think it is a software bug. Hard to say what causes the drop on battery health. My suggestion is to install the Mac app CoconutBattery, connect your phone via Lightning cable and see what the more accurate battery health of your phone. Might want to consider installing iOS 15.3.
Click to expand...
I don’t have a Mac but Is there something similar for windows that would work like coconutbattery and yea I doubt it will go back up as well
 
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