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View Full Version : G751 Drained laptop battery won't charge.



Alex8850
08-02-2016, 02:45 AM
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

gtan777x
08-11-2016, 09:37 AM
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.

Tom@ASUS
08-13-2016, 12:22 AM
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.

JustinThyme
08-14-2016, 02:18 PM
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.

FIFOPS73
04-16-2017, 06:39 AM
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 :)

scpanish
04-28-2017, 01:18 AM
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

Julskey
04-28-2017, 07:08 PM
Justin is right regarding these new batteries. Never let it drain to zero percent or it may never recover at all.*

warryabel
04-29-2017, 06:21 AM
one of the mods give this tip too...let it drain to 0 to recalibrate...lol:confused:

Clintlgm
04-29-2017, 12:09 PM
I don't think Tom@Asus has anything to do with being an Asus employee or any kind of Mod for these forums.

warryabel
05-02-2017, 07:57 AM
I don't think Tom@Asus has anything to do with being an Asus employee or any kind of Mod for these forums.:cool:

XMgpMX
05-02-2017, 08:37 AM
The same thing is affecting my GL551-JX, except I didn't do any kind of 0 charge calibration. I updated to win10 Creator's a couple of weeks ago and noticed at about the same time that the battery wasn't charging and problems with running some games, could be totally unrelated though.

Eleiyas
05-02-2017, 08:56 AM
I don't think Tom@Asus has anything to do with being an Asus employee or any kind of Mod for these forums.

To be called @ASUS you have to be an ASUS employee or representative.

Clintlgm
05-02-2017, 01:10 PM
Yea that's why I posted that he wasn't a Asus Rep, Eleiyas@asus corrected me, but then these are the issues we have with Asus Tech support, tech that don't know what they doing.