Battery capacity rapidly degrading

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  • A battery suffers from higher wear levels over 80% the cycles on your battery depend on how you charge it what you just said makes no sense sorry you need to read more on it as it seems you don't understand how cells work, I know what you are trying to say but it doesn't work that way, 100% charging your battery will put more wear on the battery and increases degradation for anything over the 80% but every battery is different and there are different types of cells that require different charging habits, if you are unsure let me know and I can link you to some information


  • I think you are describing some other kind of battery. Charging to 80% does not form a "ceiling" for the battery. Li battery does not work like that.

    After 80%, it becomes harder to push electrons into the Li battery and more heat is generated. Li battery does not like heat at all. I do occasionally charge it up to 100% if I am going to be outside for a while.

    This is why I do not like to post in forums. YOU HAVE PEOPLE WHO ARE JUST ANGRY AT EVERYTHING, EVEN IF IT IS NOT DIRECTED AT ANYONE AND SIMPLY A SHARING OF EXPERIENCE AND KNOWLEDGE. SOME PEOPLE JUST TAKE EVERYTHING SO PERSONALLY.

    HERE IS A LINK OF AN ARTICLE FOR YOU TO STUDY AND LET'S LEAVE IT AT THAT.

    h**ps://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

  • Yes! There's always a risk (small but definitely there) with restoring a backup since it may bring back the very thing that caused the battery drain.

  • I'm aware that charging beyond 80% can cause rapid degradation. Accubattery tells you this multiple times within the app. They actually have a timer that rings off when your device reaches 80%. This is a default setting in the app. I actually went in and denied every app from automatically starting. Signal is the only one I didn't do this with because I wasn't getting text messages until I opened the app. So I left that but everything else has been denied. I've noticed quite a difference in the battery life. My stand by life used to be horrible. It would drain up to 8% a hour. Now I only loose around 2%. Denying most apps from automatically starting makes more of a difference than I initially thought

  • Battery degradation is a common issue for rog 2 including other phones such as redmi and samsung. We just don't observe it that much on other phones because they got limited capacity of 3700-4000 mah which is not much to begin with. Its just we expect so much more from 6000 mah battery and let me state a fact, it doesnt matter if the battery is degrading fast or slow, it will not be covered in warranty unless your phone hits from 100%-50% in an hour which is a serious issue and this level of degradation is impossible to happen within warranty period. That might as well get you a free battery replacement.

    Even if you dont get a free battery replacement you just have to pay 3k rs which is the same cost of hyper charger so i dont mind paying 3k for using my phone for 2 more years.

  • VampVamp Level 3

    Batteries like lithium ion or lithium polymer when are charged they just increase the voltage of the battery. Say new battery have a voltage of 4.2 v. Charging battery upto a 100% from 0% will cause you a full cycle of charge i.e. charging from base voltage to Full 4.2v. This max voltage with time will degrade causing degradation of battery say after 1 year its degraded to 4.0v so automatically your battery will be degraded say 20%, now if you charge your device to 100% ( although it says 100% but it's still 80% as software cannot determine that voltage change).

    Most of the batteries are good for 300 cycles and since the charging is exponential, charging beyond 80% causes more wear to the battery, charging upto 80% causes maybe like half a cycle so you can use your device theoretically for twice the time when compared to charging your battery at 100%.

  • anjubunny123anjubunny123 Level 3
    edited August 2020

    Lets just think that I am leaving the phone overnight to charge to 100 % everyday (with scheduled charging from 10pm to 6am)and I am left with 3% on the end of day with 7.5 to 8 hrs of sot with 1.5hrs of gaming ,1.5 hours of web browsing ,1.5 hours of media consumption

    What will be the health of battery after one year and 2nd year and 3rd year respectively cause i have to use this phone until my graduation in 4th year and I bought this phone in mid 1st year

    Can it be usable until 4th year? Or at which year do I need to replace my battery

    @Anders_ASUS @Vamp

  • Look, battery can last upto maximum 4 years if taken good care of it but after 2 years battery are partially degraded i.e if your battery is draining 5%/h while using youtube then after 2 years it will be 10%/h and after 4 years it will double upto 20%/h which will still be usable for good 3 hours or so.

  • Battery degradation depends on wears on battery which is more when you charge above 80%. So even if you have the scheduled charging you are still charging it above 80%. Battery consumption also depends on temperature of phone or room. I once had my AC on 20°C and my phone battery was draining fast because now i know that phones battery need to reach a certain temperature to function properly and if the temp is too low then the battery will do more work to bring it to usable temperatures. And on hot temperatures the battery drain increases to prevent overheating of device and prevent burn of any component such as screen. When you charge battery to 80% it will have 0.5-0.7 wear and as they stated a battery is good for 300 wears which means you can have the device for good 2 years and have no impact on battery. After 2 years your battery has approx 150-250 wear depends on % you charge to. If you are charging to 100% then in 2 years you might want to consider replacing your battery which is fairly very good option rather than buying a new phone. Battery replacement only costs 3000 rs in india which is cheaper than i thought and you can use phone for another good 2-4 years depending on what you use it for.

  • anjubunny123anjubunny123 Level 3
    edited August 2020

    Understood thanks,from now on I will let it charge to 80% and won't let it drop below 20%

    At present my battery health is at 85% with 5000mah in accu battery

    But as I Charge overnight I really need the Rog 3 feature to stop charging at 80% and reduce the charging power to 10w ,these 2 features are literally one of the best features no phone has ever had.

    I really hope Rog 2 gets these two features in the coming updates

    @Anders_ASUS please provide us with these 2 features@Anders

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