Windows 10: Battery charging advice


  1. Posts : 281
    Windows 10 Home 64-bit and ANDROID Lollipop
       20 Jun 2018 #1

    Battery charging advice


    When the battery is fully charged is it necessary to switch the AC charge off? I have had contradictory advice on this, and now due to a charging / battery issue with my 2-in-1 Tablet PC I need to know. If I do turn AC off I usually (not always) find I cannot switch charging back on. For charging to restart I have to Shutdown. Restarting the PC does not cause charging to start again. It can be that at the point charging is required, it is at the least inconvenient to Shutdown. If I have to, so be it, but it would be better if I can leave AC switched on. What usually happens then is when the charge drops to some point around 70% to 80% it starts charging again, automatically.

    A related question, is it normal not to be able to run the PC from the AC when the battery charge has fallen to 0%? Or maybe this can be done if the battery is removed, but if so it is not of use to me as my Tablet PC, in common with others, is not easy to open
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  2. Berton's Avatar
    Posts : 5,416
    Win10 Home and Pro, Win10 Insider Preview, WinXP Home Premium, Linux Mint
       20 Jun 2018 #2

    I've never seen an AC adapter that has a switch, need to unplug it from the computer if wanting to use battery only. I have seen Notebooks that have to drop battery supply down to less than 70% before the charging message shows on the icon. [An All-in-One Desktop does not contain a battery although the AC adapter will look like the ones used by Notebooks.]
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  3. Posts : 281
    Windows 10 Home 64-bit and ANDROID Lollipop
    Thread Starter
       22 Jun 2018 #3

    By switching off the AC supply I mean using the switch on the mains hub which I have. It has 6 AC sockets and 2 USB ---- very useful.

    I am still hoping to get an answer to my question --- when the battery reaches 100% and I get a popup notification saying "Fully Charged -- disconnect AC connection" can I in fact leave it on, in charge mode but not charging? My understanding is that the answer is YES, modern batteries are not harmed by being left on even if 'charging', but I would welcome reassurance.

    Also, although I said above that when the charge drops to around 70% - 80% charging 'usually' starts up again automatically it should be 'sometimes' as what usually happens is charging does not start automatically, I have to Shutdown Windows to start charging again. I believe this to be a fault, either with the hardware or the OS, I have no idea which. It is not a major issue but can be inconvenient at times, and if I do not keep an eye on the battery status (for which I do now have some good apps) it can lead to a crash when 0% is unintentionally reached.

    So an All-in-One Desktop does not have a battery? That seem to me to mean it is wrongly named as without a battery it cannot fulfill ALL functions can it? I can think of occasions when a battery would serve a useful purpose, but I have not used a Desktop for many years.
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  4. Posts : 901
    Windows 10
       22 Jun 2018 #4

    1) The battery charging stops when fully charged with the charger on, thus no need for manually switching off.

    2) If the battery is at zero charge, the charger is used to run the Laptop and recharge the battery.

    Depends on the manufacturer when charging starts, on mine anything less than 100%. Some seem to think a 70% charge as lengthening the lifetime of their batteries.

    You only need to waft the mouse pointer over the standard Windows taskbar battery Icon to see the charge %.

    An AIO desktop does not have a battery. It may well have PSU looking like a charger as some may use Laptop type MOBOs, basically fitted in the monitor casing.
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  5. Bree's Avatar
    Posts : 8,851
    10 Home x64 (1809) (10 Pro on 2nd pc)
       22 Jun 2018 #5

    Helmut said: View Post
    Depends on the manufacturer when charging starts, on mine anything less than 100%. Some seem to think a 70% charge as lengthening the lifetime of their batteries.
    It very much depends on the manufacturer. Some have battery saving options that can be turned on in their bios. My Samsung will stop at 80%. My Dell has a comprehensive set of options in its bios. My Toshiba has none.

    General rule of thumb to extend battery life seems to be never charge to 100% or run it down completely. Charging little and often seems best.

    Similar to a mechanical device that wears out faster with heavy use, the depth of discharge (DoD) determines the cycle count of the battery. The smaller the discharge (low DoD), the longer the battery will last. If at all possible, avoid full discharges and charge the battery more often between uses. Partial discharge on Li-ion is fine. There is no memory and the battery does not need periodic full discharge cycles to prolong life.
    How to Prolong Lithium-based Batteries - Battery University
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  6. Posts : 703
    Windows 10 Pro 64bit 1809 17763.55
       22 Jun 2018 #6

    My Gaming HP Omen Laptop has no specific battery options in bios that I seen, but I tend to keep it charged to 80-90 percent if I remember to disconnect charger before 100 percent, battery is non removeable on that laptop so I tend to switch off using battery, and sometimes using AC power when gaming
      My ComputersSystem Spec

  7.    23 Jun 2018 #7

    Older batteries, based on NiCd (Nickel-Cadmium) had many drawbacks. like charge "memory" and easily being overcharged and warped. Needed careful planing and charging to keep in shape. Best way was to keep them fully charged and out of laptop when not needed, run from adapter only. Than you needed to plug them in and discharge and recharge once a moth.
    Newer laptops and their batteries have automatic charge system with sensors and intelligent maintenance so no need to unplug at all. Added bonus is that when plugged in it switches to full performance and on battery only it kicks into battery saving mode reducing performance.
      My ComputersSystem Spec


 

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