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It depends on how you charge the phone. Do you let it plugged for a very long time even when it's a 100%? Does your phone get too hot while charging? Does your phone get too hot almost everytime? The more heat the more battery wear.
I use A hard shell UAG case. and it gets kinda hot when about 10% to 50% when charging then it starts to cooldown.
 
My Battery health is 99% exactly 1 month. Bought it march 2 ?

Is this defect or something? should be 100% right?

and i use a Authentic 12 watt apple charger

Why do you use a 12 watt charger ? Just to kill your battery ?
The charger provided is a 5 watt charger, with it you get a slow charging that will keep your battery safe.
 
Why do you use a 12 watt charger ? Just to kill your battery ?
The charger provided is a 5 watt charger, with it you get a slow charging that will keep your battery safe.
So, i Should switch back to the 5 watt? :/
 
In theory the more heat = the more battery wear. In practise the difference is so small that charging with the 12W iPad charger won't affect the battery more than 2% in 2 years.
 
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Why do you use a 12 watt charger ? Just to kill your battery ?
The charger provided is a 5 watt charger, with it you get a slow charging that will keep your battery safe.

So, i Should switch back to the 5 watt? :/

No. He has no idea what he’s talking about. The iPhones and chargers are built to limit the amount of power brings used and Apple itself recommends the 12w for iPhone charging. Guy has no idea what he’s talking about.
 
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Battery health is never an exact science, more like an estimate. Just consider 99% to be 100% with a small margin of error.
 
The battery capacity reading (%) will change up and down based on temperature, current charge level, the type of charger you use and because of general variability. It isn't a dead set number set in stone. I still have my iPhone on iOS 9.3.5 so i have always had battery health data available to see using coconutBattery and Battery Life app. The battery capacity has always wavered a bit and is different every day by a couple percent. One percent is nothing. Pay attention when it drops below 90%.

Here's my graph over the last few months using Battery Life app. iPhone is 2 years old with 689 cycles. You can see that it varies a bit every day. (This function doesn't work with iOS 11- Apple took it away).

You can also see that one day, the app said the battery capacity was 78% (both apps). I guess the battery was having a bad day.

image.png
 
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What do you have to do to get cycle count ? I don’t see it on that battery app !!?? 1 month iPhone X and it’s still
 
Apple disabled battery data accessibility starting with iOS 10 (probably to hide the fiasco that was about to develop). Previous versions of iOS allowed apps to access this information. It's been blocked in iOS 11. Kinda a dastardly move if you ask me. The phone still records capacity & cycles but you're no longer allowed to view it. Only the Apple Store techs have access to it.
 
Apple disabled battery data accessibility starting with iOS 10 (probably to hide the fiasco that was about to develop). Previous versions of iOS allowed apps to access this information. It's been blocked in iOS 11. Kinda a dastardly move if you ask me. The phone still records capacity & cycles but you're no longer allowed to view it. Only the Apple Store techs have access to it.

just plug in and use coconut battery on your mac, then you can see the cycles still
 
No. He has no idea what he’s talking about. The iPhones and chargers are built to limit the amount of power brings used and Apple itself recommends the 12w for iPhone charging. Guy has no idea what he’s talking about.

OMG , an electricity expert
 
I’m sorry, but doesn’t take an expert to see that you have zero idea what you’re talking about.

And seriously with the ad hominem? What are you, 12?

yes, fast charging will hurt your battery. Doing it too much will hurt it all the faster. Using a battery is not what damages them, it is the charging and allowing them to sit uncharged that damages a battery.

Charging holds different levels of ability to damage your battery. The faster it charges, the higher the wavelength which is used to charge. The higher a wavelength, the more rapidly it deteriorates. Higher wavelengths also occupy more space which means your battery charge will not last as long being fast charged. Lastly, the higher a wave length, the more heat it brings with it and heat is always a bad thing for electronics.

The proper way to charge any battery is in the slowest possible way which uses the lowest possible wavelength. This both makes that one charge last longer AND makes the life of your battery longer. (Cf Ron Hobson)
 
yes, fast charging will hurt your battery. Doing it too much will hurt it all the faster. Using a battery is not what damages them, it is the charging and allowing them to sit uncharged that damages a battery.

Charging holds different levels of ability to damage your battery. The faster it charges, the higher the wavelength which is used to charge. The higher a wavelength, the more rapidly it deteriorates. Higher wavelengths also occupy more space which means your battery charge will not last as long being fast charged. Lastly, the higher a wave length, the more heat it brings with it and heat is always a bad thing for electronics.

The proper way to charge any battery is in the slowest possible way which uses the lowest possible wavelength. This both makes that one charge last longer AND makes the life of your battery longer. (Cf Ron Hobson)

Ok, now let’s talk real data. Can you point me to a scientific measurement that shows the real world impact on an iPhone’s battery life and health if I switch over to the 12V charger- let’s say exclusively for the two year timeframe I aim to use the device in.

I get that faster charging might wear out the battery quicker, but I’m I interested to find out by how much.

I have been using iPhone and iPad chargers interchangeably since the first iPad and never felt much of an impact on the battery either way.
 
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my launch day 8 is now down from 97 to 96

oh apple why did you allow us to see this

worst ive seen for an 8 so far here...then again im a bit suspicious of all the 100s...
 
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Ok, now let’s talk real data. Can you point me to a scientific measurement that shows the real world impact on an iPhone’s battery life and health if I switch over to the 12V charger- let’s say exclusively for the two year timeframe I aim to use the device in.

I get that faster charging might wear out the battery quicker, but I’m I interested to find out by how much.

I have been using iPhone and iPad chargers interchangeably since the first iPad and never felt much of an impact on the battery either way.

Of course you will not find a scientific paper explaining the difference in charging an iPhone 8 with a 12 watts charger after two years compare to the same iPhone 8 charged with a 5 watts charger .
But if you want to know exactly what is happening with lion battery and charger just read all the material at :

http://batteryuniversity.com/learn/article/sharing_battery_knowledge

Have a nice day

Btw , high discharge is also a problem for battery longevity
8e63a23b2756d91564a8891b1d28019b.jpg
 
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LOl after charging 1 time yesterday it rebooted itself just now and i got 98% what the ****
[doublepost=1522683870][/doublepost]
my launch day 8 is now down from 97 to 96

oh apple why did you allow us to see this

worst ive seen for an 8 so far here...then again im a bit suspicious of all the 100s...
Yeah. im now at 98% after charging 1 time LOL on airconditioned room
 
LOl after charging 1 time yesterday it rebooted itself just now and i got 98% what the ****
[doublepost=1522683870][/doublepost]
Yeah. im now at 98% after charging 1 time LOL on airconditioned room
You really need to relax and stop checking it. Just let it be. You’re worrying entirely too much about this.

May I suggest turning OFF battery percentage altogether?
 
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Of course you will not find a scientific paper explaining the difference in charging an iPhone 8 with a 12 watts charger after two years compare to the same iPhone 8 charged with a 5 watts charger .
But if you want to know exactly what is happening with lion battery and charger just read all the material at :

http://batteryuniversity.com/learn/article/sharing_battery_knowledge

Have a nice day

Btw , high discharge is also a problem for battery longevity
8e63a23b2756d91564a8891b1d28019b.jpg

What this app??
 
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