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  1. #1
    ROG Guru: Yellow Belt Array
    Join Date
    Oct 2012

    what is causing battery to discharge 5% while plugged in?

    The battery constantly cycles between 95%-100% while plugged, under light to no load.

    It actually loses 5% pretty fast while remaining plugged in. I would estimate it takes a day to lose 5% while plugged in.
    That's a fast discharge.

    What is consuming the battery juice?
    There shouldn't be anything using the battery while the laptop is plugged in.

    Also, a disconnected battery doesn't lose 5% battery juice in 24 hours, or else you would have a dead laptop if you didn't use it for 20 days.

  2. #2
    ROG Guru: Yellow Belt Array
    Join Date
    Jun 2017

    Sounds normal to me. The system will allow a little discharge before charging it back up. normal cycle for batteries.. (your phone would do the samething if plugged in overnight just maybe not display the difference in %).

    Keeping a battery at 100% is probably the worst thing for it, Im sure it has some internal circuitry that allows a slight discharge to help inscrease its lifespan.

    have you tried this software to help increase its overall life even further?

  3. #3
    ROG Guru: Black Belt Array Korth PC Specs
    Korth PC Specs
    MotherboardASUS X99 R5E (BIOS2101/1902)
    ProcessorHaswell-EP E5-1680-3 SR20H/R2 (4.4GHz)
    Memory (part number)Vengeance LPX 4x8GB SS DDR4-3000 (CMK32GX4M4C3000C15)
    Graphics Card #1NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Graphics Card #2NVIDIA Quadro GP100GL/16GB, 16xPCIe3, NVLink1 (SLI-HB)
    Sound CardJDS Labs O2+ODAC (RevB), USB2 UAC1
    MonitorASUS PG278Q
    Storage #1Samsung 850 PRO 512GB SSDs, 4xSATA3 RAID0
    Storage #2Comay BladeDrive E28 3200GB SSD, 8xPCIe2
    CPU CoolerRaijintek NEMESIS/TISIS, AS5, 2xNH-A14
    CaseObsidian 750D (original), 6xNH-A14
    Power SupplyZalman/FSP ZM1250 Platinum
    Headset Pilot P51 PTT *modded*
    OS Arch, Gentoo, Win7x64, Win10x64
    Network RouterActiontec T3200M VDSL2 Gateway
    Accessory #1 TP-Link AC1900 Archer T9E, 1xPCIe
    Accessory #2 ASUS/Infineon SLB9635 TPM (TT1.2/FW3.19)
    Accessory #3 ASUS OC Panel I (FW0501)
    Korth's Avatar
    Join Date
    Mar 2015

    Battery isn't new anymore and isn't actually reaching full charge, cell chemistry degrades/erodes over time and use.

    The embedded regulator may report "100% (4.1V)" while in reality some weak cells aren't capable of exceeding 95% (~3.9V), at least not when heated a bit above room temp.
    "All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams


  4. #4
    ROG Guru: Yellow Belt Array
    Join Date
    Oct 2012

    nevermind, I just read on battery university website that lithium batteries normally discharge 5% in 24 hours, and then slowly discharge after that.
    Last edited by link626; 07-08-2018 at 09:31 AM.

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