iPhone 13 Pro Max 13 Pro Max Battery Capacity dropped already

[Gamemulator]

I think imazing? Or it could have been 3utools

Thank you will check both out.

 

[harryisere]

My 13 pro max is still at 100%. I’ve had it since Mid November. I try to keep it between 40% and 80% and tend to charge it with the the standard 5w charger but also through my car stereo occasionally.

 

[reppans]

Re: 80-40 battery cycling.

Here’s some good research/testing/examples indicating the lower you can maintain peak/average SoC, the longer the battery will last (one and two). I’m personally down to 65-15% cycling for my XR.

IMHO, the ‘keep it above 40%’ thing comes from long-term storage recommendations (where LT self-discharge can over-deplete batts), unless of course someone can present credible evidence otherwise.

 

[Tsepz]

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.

When Apple released particular update they added a recalibration for the iPhone 11 series where I believe some people saw the health number going up, now of course the real health didn’t go up but I guess the algorithm had some inaccuracies they fixed. Some people saw the number go up and then a multiple percentage drop lol. ?

 

[JUCJ85]

My 13PM that I've had since Launch is still at 100% battery health.

 

[yegon]

delete

 

[The-Real-Deal82]

Wireless charging does generates heat which can affect the battery adversely.

It depends I think. My wife and I have the same charging patterns where we charge over night. I wireless charge and she plugs in yet her battery is a couple of percentage worse than mine.

 

[patsfan83]

I'm at 5.5 months with my iPhone 13 Pro, still at 100%. This battery should last forever, I rarely dip below 50% each day, so likely getting twice the days between battery cycles as my iPhone X. My iPhone X hit 80% after almost 3.5 years, so got lucky with that one.

I noticed my 13P will not optimize charge correctly with the USBC fast charger, or a cheap wireless puck. It would only sit at 80% for an hour or so and then be fully charged almost all night.

I switched to a 3-1 MagSafe stand and now it sits at 80% most of the night and tops off before my alarm.

 

[The Game 161]

Still on 100% here. Use wireless charging all the time

 

[Jutah]

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!

Hi @toomasjoamets i pop your answer up to ask you something more.
I've searched for some references without success: since your suggestion i left my slow 5w charger and started the 40/80 rule.

Coconut shows more solid mAh values. What is better beetwen 20 or 12W charger?

 

[Taz Mangus]

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".

Here’s the Truth Behind the Biggest (and Dumbest) Battery Myths

Yes, charging your phone overnight is bad for its battery. And no, you don’t need to turn off your device to give the battery a break. Here’s why.

www.wired.co.uk

The more slowly you charge a battery, the less strain that’s put on lithium ions and the structures accepting them, and the less potential damage to the battery.

 

[Taz Mangus]

This is an interesting article about smart battery calibration.

BU-603: How to Calibrate a “Smart” Battery

BU meta description needed...

batteryuniversity.com

A smart battery self-calibrates by taking advantage of occasional full discharges, but in real life this seldom happens. Most discharges are intermittent and go to random depth. In addition, the load signatures often consist of high frequency pulses that are difficult to capture. The partially discharged battery may be partly recharged and then stored in a warm room, causing elevated self-discharge that cannot be tracked. These anomalies add to the display error that amplifies with use and time.

To maintain accuracy, a smart battery should periodically be calibrated by running the pack down in the device until “Low Battery” appears and then apply a recharge. The full discharge sets the discharge flag and the full charge establishes the charge flag. A linear line forms between these two anchor points that allow SoC estimation.

 

[Zaft]

I don't really know how accurate that info is.. My 9 month old 12 Pro Max is still at 100%.
I do 50/50 wired/wireless.

 

[Taz Mangus]

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.

BU-802b: What does Elevated Self-discharge Do?

BU meta description needed...

batteryuniversity.com

Li-ion self-discharges about 5 percent in the first 24 hours and then loses 1–2 percent per month; the protection circuit adds another 3 percent per month. A faulty separator can lead to elevated self-discharge that could develop into a current path, generating heat and, in an extreme case, initiate a thermal breakdown.

 

[Jutah]

This is an interesting article about smart battery calibration.

BU-603: How to Calibrate a “Smart” Battery

BU meta description needed...

batteryuniversity.com

nice! so - every 3 months, more or less - it's a kind of best practice to do a 100%>10%>100% cycle to calibrate again the battery.

Here’s the Truth Behind the Biggest (and Dumbest) Battery Myths

Yes, charging your phone overnight is bad for its battery. And no, you don’t need to turn off your device to give the battery a break. Here’s why.

www.wired.co.uk

i stumpled upon this article some days ago while i was searching information about fast/slow charging. I'm a bit confused: probably 5w is really too slow, 12 is good, 20 is still good but higher than 20 not.

 

[Taz Mangus]

nice! so - every 3 months, more or less - it's a kind of best practice to do a 100%>10%>100% cycle to calibrate again the battery.

What would be interesting is to see what the difference in the battery percentage for iOS vs CoconutBattery after doing the calibration.

i stumpled upon this article some days ago while i was searching information about fast/slow charging. I'm a bit confused: probably 5w is really too slow, 12 is good, 20 is still good but higher than 20 not.

I don't think is really matters much for slow charging, 5 watts vs 12 watts. I use a 12 watt charger and my phone stays cool to the touch during charging. I would consider 20 watts fast charging.

 

[AlexJ092]

No issues here with my battery life. My iPhone 13 pro max (launch day) still says 100% at the moment.

 

[nintendoswitch]

My dad has had his 13 pro max since launch day, and it’s still 100% max capacity, somehow.

 

[ajay96]

Still 100 here:

I tend to use a MagSafe charger at home, and charge at night since launch day

 

[Fred Zed]

What would be interesting is to see what the difference in the battery percentage for iOS vs CoconutBattery after doing the calibration.


I don't think is really matters much for slow charging, 5 watts vs 12 watts. I use a 12 watt charger and my phone stays cool to the touch during charging. I would consider 20 watts fast charging.

Reference, coconut battery reading v others. Perhaps compare it also with what the aggregated log file says ? Just an idea.

 

[Jutah]

What would be interesting is to see what the difference in the battery percentage for iOS vs CoconutBattery after doing the calibration.

Sure. I think i'll do this test when i'll

Still 100 here:


View attachment 1955378

I tend to use a MagSafe charger at home, and charge at night since launch day

4476 as full charge capacity? ??
When did you buy the phone??

 

[ajay96]

Sure. I think i'll do this test when i'll


4476 as full charge capacity? ??
When did you buy the phone??

?I received it on September 24th, ordered through my carrier

 

[MacBookPro17inch]

I’ve just received my iPhone 13 Pro Max and I’m a heavy user.
I use my phone several hours every day.

I’d like to use it as battery protecting as possible.
Any ideas ?

Should I charge over night with the old 5W Adapter?
Should I get MagSafe?

I have a couple of old 5W chargers and I also just bought a 20W Adapter but I assume the faster charging would harm the battery... I’m fine with using it only if I have to charge quicker for some reason.

I can imagine, that a full charge takes like for ever with the 5W Adapter...

I’ve been using my current iPhone 8 Plus for 2 years straight now and I’m at 82%
I’ve usually charged it with the 5W Adapter over night. (I’ve never used any other Adapter)

 

[MacBookPro17inch]

Still 100 here:


View attachment 1955378

I tend to use a MagSafe charger at home, and charge at night since launch day

Awesome ?
Maybe, I should get the MagSafe charger?

 

[OhMyMy]

Awesome ?
Maybe, I should get the MagSafe charger?

MagSafe is better than conventional Qi chargers. Most of the heat generated is due to the misalignment of the coils and MagSafe eliminates that issue. And since it only goes till 15W you won’t be generating much heat there either. You should be fine with a MagSafe.

I’ve been charging overnight with MagSafe and 20W adapter and my battery health is still 101+. And sometimes I use my 96W block from MBP when it’s all I got. I just don’t use my iPhone while charging and especially fast charging.