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  1. #1
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    low quality battery in G75x ?

    After reading several stories/posts about bad battery, I check the battery status on each laptops around

    run powercfg /bateryreport on Windows 8.1 or windows 10 command prompt
    run powercfg /energy on windows 7

    interesting finding:
    zBook still 100% of designed capacity after 2 years and 4000 hours use
    the rest are around 99%

    unfortunately G751s: 97% and 98% within 100 hour and 50 hours use, horrible!

    just wonder how your G75x battery is doing? If it is a common problem for Asus G75x, maybe we should raise our concern especially Asus made battery replacement non-user serviceable.
    Last edited by cdma2k; 02-01-2016 at 02:14 AM.

  2. #2
    ROG Guru: Gold Belt Array Clintlgm PC Specs
    Clintlgm PC Specs
    Laptop (Model)Asus G752VY DH72
    MotherboardAsus Z97 Pro WiFi and /Z97 Pro A
    ProcessorI7 4790K
    Storage #1512 GB M.2 Samsung 960 Pro
    Storage #21 TB Samsun 850 Pro
    CaseCool Master Haf
    OS Win 8.1 Pro and Win 10 Pro
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    Well my G75VW seems to be working just fine since 2012. I really don't think anyone buying a 17" gaming notebook is concerned about battery life. Mine does exactly what I expect it to do. I only need it as a UPS and it hasn't failed yet.
    G752VY-DH72 Win 10 Pro
    512 GB M.2 Samsung 960 Pro
    1 TB Samsung 850 pro 2.5 format
    980m GTX 4 GB
    32GB DDR 4 Standard RAM

    Z97 PRO WiFi I7 4790K
    Windows 10 Pro
    Z97 -A
    Windows 10 Pro

  3. #3
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    The battery in my G751JT has deteriorated by about 13% within 8 months. It won't charge above 86%-88% as of a week ago. The battery on my old Sony laptop loses a charge fast, but still at least charges to 100% and it's almost 6 years old.

    Judging by the number of threads on this forum that are battery issue related with the G751's, I'd say the batteries are seriously lacking in this model.

    I do keep my laptop plugged in most of the time since I use it for 3d artistic rendering, which obviously takes a lot of juice, so it's not a huge issue for me. But going from a laptop that I never had to worry about percentage loss to one that loses so much in less than a year really surprised me. Especially for paying so much, one would think the battery life would last at least a couple years.

  4. #4
    ROG Guru: Gold Belt Array Clintlgm PC Specs
    Clintlgm PC Specs
    Laptop (Model)Asus G752VY DH72
    MotherboardAsus Z97 Pro WiFi and /Z97 Pro A
    ProcessorI7 4790K
    Storage #1512 GB M.2 Samsung 960 Pro
    Storage #21 TB Samsun 850 Pro
    CaseCool Master Haf
    OS Win 8.1 Pro and Win 10 Pro
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    Yes I have to agree if its not charging to100% you have a hardware issue. I don't really pay attention to mine but I just looked and it says 96% not charging.
    G752VY-DH72 Win 10 Pro
    512 GB M.2 Samsung 960 Pro
    1 TB Samsung 850 pro 2.5 format
    980m GTX 4 GB
    32GB DDR 4 Standard RAM

    Z97 PRO WiFi I7 4790K
    Windows 10 Pro
    Z97 -A
    Windows 10 Pro

  5. #5
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    Quote Originally Posted by BrandyT View Post
    The battery in my G751JT has deteriorated by about 13% within 8 months. It won't charge above 86%-88% as of a week ago. The battery on my old Sony laptop loses a charge fast, but still at least charges to 100% and it's almost 6 years old.

    Judging by the number of threads on this forum that are battery issue related with the G751's, I'd say the batteries are seriously lacking in this model.

    I do keep my laptop plugged in most of the time since I use it for 3d artistic rendering, which obviously takes a lot of juice, so it's not a huge issue for me. But going from a laptop that I never had to worry about percentage loss to one that loses so much in less than a year really surprised me. Especially for paying so much, one would think the battery life would last at least a couple years.
    Yes, 13% loss within 8 months is not acceptable for a product positioned as high-end and costs that much

  6. #6
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    To be more specific, when you
    run powercfg /bateryreport on Windows 8.1 or windows 10 command prompt
    run powercfg /energy on windows 7

    there are several parameters printed out

    Full Charged Capacity
    Designed Capacity

    Battery Wear Level = Full Charged Capacity / Designed Capacity

    I'm not happy with lossing 3% (i.e. 97% of battery wear level after less than 100 hours' use of my G751)

  7. #7
    ROG Guru: Gold Belt Array Clintlgm PC Specs
    Clintlgm PC Specs
    Laptop (Model)Asus G752VY DH72
    MotherboardAsus Z97 Pro WiFi and /Z97 Pro A
    ProcessorI7 4790K
    Storage #1512 GB M.2 Samsung 960 Pro
    Storage #21 TB Samsun 850 Pro
    CaseCool Master Haf
    OS Win 8.1 Pro and Win 10 Pro
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    NAME G75--52
    MANUFACTURER ASUSTek
    SERIAL NUMBER -
    CHEMISTRY LIon
    DESIGN CAPACITY 78,000 mWh

    FULL CHARGE CAPACITY 62,370 mWh
    CYCLE COUNT


    Ok so I'm @80% after 3.5 years
    G752VY-DH72 Win 10 Pro
    512 GB M.2 Samsung 960 Pro
    1 TB Samsung 850 pro 2.5 format
    980m GTX 4 GB
    32GB DDR 4 Standard RAM

    Z97 PRO WiFi I7 4790K
    Windows 10 Pro
    Z97 -A
    Windows 10 Pro

  8. #8
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    Quote Originally Posted by Clintlgm View Post
    NAME G75--52
    MANUFACTURER ASUSTek
    SERIAL NUMBER -
    CHEMISTRY LIon
    DESIGN CAPACITY 78,000 mWh

    FULL CHARGE CAPACITY 62,370 mWh
    CYCLE COUNT


    Ok so I'm @80% after 3.5 years
    thanks, fyi, my HP zBook 100% after 2 years/4k hous, Acer Aspire 93% after 6 years/22.3k hours; I guess we can not say Asus's battery meets our expectation

  9. #9
    Banned Array JustinThyme PC Specs
    JustinThyme PC Specs
    Laptop (Model)G752VY-DH72
    MotherboardRampage VI Extreme
    ProcessorI9 9940X
    Memory (part number)64GB DDR4 8x8 Corsair Dominator Platinum 3800 MHz @ C17
    Graphics Card #1ASUS Strix 2080Ti O11G @ 2.1GHz
    Graphics Card #2ASUS Strix 2080Ti O11G @ 2.1Ghz
    Graphics Card #3ROG Nvlink
    Graphics Card #4Have to feed animals
    Sound CardExternal Audioengine D1 24 bit 192kbps DAC
    MonitorASUS PG348Q @ 100Hz
    Storage #1Intel 905P 480GB U2 flavor
    Storage #2Samsung 850 EVO 1TB X2 in RAID 0, 960 PRO 1TB DIMM.2_1
    CPU CoolerHeatKiller IV PRO and VRM blocks ,Dual D5 PWM serial, 2X 480, 1X 360 RADS
    CasePhanteks Enthoo Elite 8X LL120 PWM, 3X LL140 PWM, 12 SP120 PWM 1x AF140 PWM
    Power SupplyCorsair AX 1500i
    Keyboard ASUS Claymore
    Mouse ASUS Spatha, Logitech MX Master
    Headset Sennheiser HD 700
    Mouse Pad ASUS ROG Sheath
    Headset/Speakers Audioengine A5+ with SVS SB-1000 Sub
    OS Win10 Pro 1809
    Network RouterNetGear NightHawk X10
    Accessory #1 NetGear Prosafe 10GBe Switch
    Accessory #2 Qnap TVS-682 NAS modded with I7 CPU

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    3 machines in the G75x family. All are fine. Diagnostics report with no issues noted. Two over a year, one less than a month. They all behave the same. Drops down to 95% before it will initiate a charge cycle and stops at 100%.
    There are a lot of user related habits that factor into the batteries longevity and accounts for more of any failure rate than anything else. There are a few cells that will crap here and there, that just the nature of extracting usable power from a chemical reaction, its still not an exact science and never will be. Batteries have evolved tremendously over the course of the last few years. 5% failure rate is acceptable according to IEEE standards.

    You cant compare a zenbook to an ROG machine, they are two totally different platforms designed for different purposes. The Zenbook uses Intel Graphics and are configured for low power comsumption as they are marketed to be ultra portable with long batter life. ROG G751 series are the complete opposite end of the spectrum. Portability and battery run time has been sacrificed for extreme performance. You hit a ROG hard enough with an intensive application that is going to tax the CPU and the GPU it is going to draw on the battery even when plugged in. Nothing you can do on a Zenbook that would ever bring that scenerio into play. Comparing the two is like comparing the size and power specifications of a Mini cooper to a Maserati. They are just not in the same league.

    There is one thread with a few users having issues with batteries. That does not equate to a general statement that all G75X series machines have low quality batteries. Google asus zenbook battery problems. If you follow the same protocol then all Zen books have low quality batteries as well. Guarantee you do a search on any battery in any device and it will yield multiple hits. Like I said 5% failure rate is 100% acceptable. Someone has to experience the 5 out of 100.

  10. #10
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    1. by zBook I mean HP zBook, not asus zenbook
    2. please read careful about what the Battery Wear Level means; you have to find out what is your current Full Charged Capacity and how far it drops from the Designed Capacity

    let's make a hyperthetical example
    G751's Designed Capacity is 90,000 mWh let's assume it can last 10 hours
    if your Full Charged Capacity is 90,000 mWh when it is new, i.e. wear Level = 100%
    then your Full Charged Capacity drops to 45,000 mWh after 1 year, , i.e. wear Level = 50%
    you still can charge it to 100%, but that's 100 % of Full Charged Capacity, i.e. 45,000 mWh, not 100% of Designed Capacity
    it can last 5 hours only now after full charge, got it?

    My concern is that the batter wear level for G75x drops too fast as time goes by
    Last edited by cdma2k; 02-01-2016 at 04:34 AM.

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