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  1. #1
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    G751 Drained laptop battery won't charge.

    Hi,

    I recently decided to "calibrate" my G751-CH71 laptop battery by reducing it to 0% energy. Now, when I try to recharge it, it stays at 0%, leaving the message "plugged in, charging". However, when I disconnect the charger, the laptop immediately shuts down, meaning the battery isn't really charging.

    Any recommendations? Or should I send it to ASUS for a new battery.

    Thanks in advance,

    Alex

  2. #2
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    I used to think like what you did there with the "calibrating the battery" esp coming from using a macbook pro for almost 3 years prior. however I've found that these gaming laptops dont really need calibration and if they are drained constantly to 0% it actually wears them down faster. My old G55's battery died that way. Wouldn't hold a single charge anymore so it was useless to keep the battery pack connected. Just had it hooked up to AC all day long. Was still able to sell it off for 1/3 the retail price and now I've got a G752 which I try to never use on battery as much as possible.

  3. #3
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    Make sure to drain your battery to 0% then charge it without turning it on for at least 10 hours. when you get it working download Power4Gear to monitor your battery health. Let your battery drain at least once a month. Otherwise let us know if you need to explore your repair options under your 12 month warranty.

  4. #4
    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
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    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
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    OS Win10 Pro 1809
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    These are lithium polymer batteries, not NiCad. They do not need to be calibrated or drained down to 0, that is actually counter productive. The chemistry, charging, discharging and everything is completely different.
    Each individual cell is charged separately if you look there are a boat load of leads going to the battery. This is known as balance charging. If you managed to actually run it slap dead as in no voltage at all there is zero chance of recovery. There is a difference between cut off voltage and you just screwed the pooch and ruined it voltage.

    My advice would be to leave it sit for a few hours until everything is at room temp then plug it in overnight, DONT TURN IT ON AND PLAY WITH IT!

    If you wake the next morning and its still dead.....Congratulations, you have calibrated your battery to ZERO and there is no chance of recovery. You will need to get a new battery.

    No need to send to ASUS unless you are uncomfortable or its still under warranty. Batteries are plentiful and not at all hard to find and takes all of about 20 minutes to replace if you take a 10 minute coffee break at the mid point.

  5. #5
    New ROGer Array FIFOPS73 PC Specs
    FIFOPS73 PC Specs
    Laptop (Model)Asus rog g751jt
    MotherboardIntel® HM87 Express Chipset
    ProcessorIntel® Core™ i7 4710HQ Processor
    Memory (part number)16GB DDR3L MHz SDRAM
    Graphics Card #1NVIDIA® GeForce® GTX970M with 3GB GDDR5
    Monitor17.3" 16:9 IPS FHD (1920x1080) anti-glare
    Storage #1128 GB SSD
    Storage #21 TB HDD
    Mouse Asus ROG GX850
    Headset Asus CERBERUS gaming headset
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    OS Windows 10 home 64-bit
    Accessory #1 Asus nomad backpack

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    Same problem

    Guys, I'm also having the same problem. I did 0 calibration in my G751 and it's not charging after that. It's just showing 0% plugged in, not charging. The led blinks red and green. Laptop shuts down after 1 min of usage.

    Can you guys suggest me any method to repair this.
    I'm from India and my warranty is expired.
    Thanks in advance

  6. #6
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    similar problem, reduced batt capacity, is there a fix?

    Hi,
    I have a similar issue. I left my G751JY on unattended and it didn't shut down, ran the battery to 0. I charged it afterwards, got partial recovery. The battery won't go beyond 85%. Is there a way to fix this, or a battery management tool such as Lenovo has? An earlier reply mentioned Power4Gear, I'll look into that. If anyone has a clue as to how to restore the battery I'd love to hear about it.
    thanks,

    Steve

  7. #7
    ROG Guru: Orange Belt Array Julskey's Avatar
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    Justin is right regarding these new batteries. Never let it drain to zero percent or it may never recover at all.*

  8. #8
    ROG Guru: Green Belt Array
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    one of the mods give this tip too...let it drain to 0 to recalibrate...lol

  9. #9
    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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    I don't think Tom@Asus has anything to do with being an Asus employee or any kind of Mod for these forums.
    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

  10. #10
    ROG Guru: Green Belt Array
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    Quote Originally Posted by Clintlgm View Post
    I don't think Tom@Asus has anything to do with being an Asus employee or any kind of Mod for these forums.

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