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TheKnight
08-28-2015, 12:44 PM
As the title says when I plug the cable to charge the laptop it says ''Plugged in, not charging''. The 1st time this happened I unistalled Microsoft ACPI-Compliant Control Method Battery, restarted my PC and then went back and clicked ''Scan for changes''. It seemed to be fixed. Today I did that but it didn't work so unistalled ACPI and Microsoft AC Adapter, restarted, checked for changes, restarted again and nothing happened. Pls note that I'm not talking about the safety feature when the battery is at 95%, when I plug mine it's at 10%. Although a few minutes(5-10 min) after I plug the cable in it starts charging. ( I checked for updates for these 2 drivers). Please help me!!!! ( I have the G751JY, BIOS version: 209 , Windows 10 and everything updated. I have this laptop for 2 weeks).

Edit by cl-Albert: Duplicate thread deleted :) .

dorioo
08-28-2015, 01:08 PM
Isn't this a safety feature to try to prolong the long term battery life? Basically, it doesn't start charging while plugged in under some circumstances it hits about 95% of the charge. Many smart phones do a similar thing.

cl-Albert
08-28-2015, 04:49 PM
Isn't this a safety feature to try to prolong the long term battery life? Basically, it doesn't start charging while plugged in under some circumstances it hits about 95% of the charge. Many smart phones do a similar thing.

Yes, as long as the battery charges when it is below 95%, it's normal.

Not sure why it was removed and hoping we can include this information in future user manuals, but if you're interested, there is an FAQ on the ASUS website below for the older ROG models about this which should still apply to these models.

http://www.asus.com/us/support/FAQ/1003960/

TheKnight
08-28-2015, 05:38 PM
Thank you cl-Albert for deleting my other thread because it was useless but I'm not talking about the safety feature, when I plug my charger the battery's at 10%

ciccio80
08-28-2015, 06:54 PM
As the title says when I plug the cable to charge the laptop it says ''Plugged in, not charging''. The 1st time this happened I unistalled Microsoft ACPI-Compliant Control Method Battery, restarted my PC and then went back and clicked ''Scan for changes''. It seemed to be fixed. Today I did that but it didn't work so unistalled ACPI and Microsoft AC Adapter, restarted, checked for changes, restarted again and nothing happened. Pls note that I'm not talking about the safety feature when the battery is at 95%, when I plug mine it's at 10%. Although a few minutes(5-10 min) after I plug the cable in it starts charging. ( I checked for updates for these 2 drivers). Please help me!!!! ( I have the G751JY, BIOS version: 208 , Windows 10 and everything updated. I have this laptop for 2 weeks).

Edit by cl-Albert: Duplicate thread deleted :) .

Well the charging problem happened once to me too, when I drained accidentally the battery completely (0%).
After 10-15 min fortunately started recharging. My advice is do not let the battery drain under 10% (I belive most Lithium batteries work best if you don't drain them <5-10%

TheKnight
08-29-2015, 05:30 AM
I actually plug in my laptop when steam sends me a message (in-game) that I have only 8 min of battery which means I have 10-12%. What can I do to fix the charging problem though?

joshindaphils
08-29-2015, 02:02 PM
I actually plug in my laptop when steam sends me a message (in-game) that I have only 8 min of battery which means I have 10-12%. What can I do to fix the charging problem though?

I would go for an RMA with documentation of exactly what the issue is and how to reproduce it (hopefully it is not intermittent in nature). This is not expected behavior and it doesn't sound software related, your previous success with the ACPI drivers could of just be happenstance.

What does your battery report look like?

Click start, run then put the below in the text box:

powercfg /batteryreport /output %USERPROFILE%\Desktop\battery_report.html

Open the resultant HTML file that appears on your desktop... may not be helpful, it may give some clues as to what is going on.

I'm assuming you are 100% sure everything is plugged in, green light on power brick etc.

TheKnight
08-30-2015, 08:46 AM
So, I have to plug in the cable when the battery is above 10%. If I plug it at 10% it will not charge but in 5-10 min it will start charging. Although when the battery is not charging the system is using power from the cable because I see that the battery isn't dropping, is just not charging. file: C:/Users/RobertPol/Desktop/battery_report.html

joshindaphils
08-30-2015, 11:48 AM
So, I have to plug in the cable when the battery is above 10%. If I plug it at 10% it will not charge but in 5-10 min it will start charging. Although when the battery is not charging the system is using power from the cable because I see that the battery isn't dropping, is just not charging. file: C:/Users/RobertPol/Desktop/battery_report.html

FYI your file didn't attach... you may have to post screenshots.

What is your usage scenario before charging at 10% is this after gaming? This *could* be some type of thermal protection before charging the battery.

For instance if you are gaming and get to 10% and you see this delayed charging behavior, then what happens if you get to 10% shut down for 10 min turn it on then plug it in, does it immediately start charging then? A third test would be to let it get to 10% under a low load (web surfing / playing video) and see if it starts charging right away when plugged in.

If all of those cases are true and consistent I would have to assume it is the system taking care of the battery and everything is 100%.

TheKnight
08-30-2015, 02:49 PM
Yes, this happens only after gaming so it is a protecting action for my battery. Thanks for your reply because I didn't know this thing existed and now I am so relieved that everything is ok.

Thanks for your help. Cheers mate :D

joshindaphils
08-30-2015, 05:11 PM
While the battery is discharging it is generating heat due to its internal resistance, along with all of your components like the GPU and CPU that will be adding additional heat causing things to get nice and toasty. When you plug your laptop in the battery will no longer be discharging and adding to it's temps, I'm assuming that this allows the battery to cool down.

The reason this only happens at 10% could simply be confirmation bias. You plug in when you get the low battery notice, and this is when you see this behavior. It could very well happen at 20% but you just haven't seen or noticed it yet do to your behavior patterns.

To be clear this is just speculation on my end. I don't know 100% that there is logic based on the thermals for charging I am just guessing as this would be a good engineering decision. I've never seen this behavior, but I don't game on battery either.

Minding the batteries temperature is important in maintaining battery life. Here is a link the breaks down that relationship: http://batteryuniversity.com/learn/article/charging_at_high_and_low_temperatures

If you are interested in maintaining your batteries life in general, it is best to not game on battery, in fact the more (both in current draw and frequency) you use your battery the more its life is shortened. The best thing is to keep your laptop plugged in. As an added benefit you will get better gaming performance as your system is limited to a 100w power budget on battery.

That said the batteries are meant to be used and there is no reason to be paranoid, just be aware that it is a consumable item and it is treated as such under the warranty.

It would be great if someone from Asus could chime in and confirm that battery thermal protection is in place with details, or you could open up a support ticket for clarification on exactly what is going on here and post back your findings. If you engage Asus I would ask point blank about battery thermal protection being a potential cause, otherwise the right questions may not get asked during any escalation.

Vythica
08-31-2015, 02:18 AM
I had this problem before....Does a red/orangey light flash on the the front where your battery LED is? I only ever had this once...it was actually after streaming and i had to plug my laptop in...and it said the same error, plugged in, not charging + flashing LED. I freaked out too, unplugged and re-plugged it back in, ripped off the battery stuff device manager then 15 mins later leaving it plugged in, it started charging again...heh scared me too.