Hi ala202 said:

Okay so after frustration took over, trying the targus universal adapter (The acer plug didn't even work, the dell one did loosely, go figure), I did a computer reset and reinstalled windows, which didn't do anything. Then I took out my extra RAM, disconnected and reconnected the battery's connection to the motherboard (screw warranty tape, it looks fine) and the ac plug in's connection to the motherboard. That didn't do anything, so then I uninstalled the battery drivers (both of them), and then did the battery reset acer says for internal batteries, holding the power button for 15 seconds, then letting rest for at least 15. After doing that, I powered it on and it charges...I don't know what ended up working, but I'm gonna try either installing my RAM again and seeing what happens, or buying a different brand if that was the case. (I have the crucial ddr4 16gb ram which was working fine for awhile).

Thanks for the additional information! I'll have to remember this. Yeah I'm not happy about the laptop going haywire if I plug/unplug at the wrong time. I'll remember to only plug/unplug when it's powered on. I hope that Acer or Microsoft can provide fix for this issue soon. Thanks again. 

This is unacceptable Acer should do a product recall and replace us with non defective ones. 

ala202 said:

I had tried that actually, and it does work, but it's very much a pain since the battery is internal. However, I think I determined the cause for my laptop's troubles. My hypothesis is that unplugging/plugging in the laptop while it is sleeping, hibernating, or shut down freaks the battery out somehow and causes it to not charge. Testing this, I've only been plugging it in/unplugging it when it's powered on, and so far, I've had no issues with it not charging. And, so long as I plugged it in before having it sleep/hibernate/shut off, it will charge just fine while turned off or sleeping.

It's annoying that the laptop is that finicky, but it's much better than having to do constant battery resets all the time, especially since what worked to get it to charge again was to uninstall the battery drivers and unplug the internal battery from the motherboard then plugging the battery back in, then let it sit for 15 or so minutes, then powering it back on and finally charging it.

I decided to contact Acer again, for the third time, about my laptop failing to charge the battery, even after I received it back from Acer from the first repair. The first time I sent it in for repair, Acer told me they couldn’t find any issues and delivered my laptop back to me with a new charging adapter. At the time, Acer believed that the issue was because of a bad charging adapter. Once the problem kept happening even with the new charging adapter, I contacted Acer again, for the second time. They only wanted to send me out another new charging adapter, and told me to contact them if the second new charging adapter failed to fix the issue. It didn’t resolve the issue. Upon contacting Acer again for the third time, I explained in detail that the only temporary fix to the charging issue was to unplug/plug the battery from the motherboard. I also explained to them that many people are having the same issue with this model laptop. Acer decided to open my repair ticket again and ask me to ship my laptop to them. I noticed this week that the repair had been completed and that my laptop is being shipped back to me. I called Acer yesterday to find out what kind of repairs were performed. They told me that they had to replace the main board (motherboard). I should be receiving my laptop tomorrow in the mail. I’ll work with it for a while and let everyone know if the repair fixed the issue. Hopefully so. 

I decided to contact Acer again, for the third time, about my laptop failing to charge the battery, even after I received it back from Acer from the first repair. The first time I sent it in for repair, Acer told me they couldn’t find any issues and delivered my laptop back to me with a new charging adapter. At the time, Acer believed that the issue was because of a bad charging adapter. Once the problem kept happening even with the new charging adapter, I contacted Acer again, for the second time. They only wanted to send me out another new charging adapter, and told me to contact them if the second new charging adapter failed to fix the issue. It didn’t resolve the issue. Upon contacting Acer again for the third time, I explained in detail that the only temporary fix to the charging issue was to unplug/plug the battery from the motherboard. I also explained to them that many people are having the same issue with this model laptop. Acer decided to open my repair ticket again and ask me to ship my laptop to them. I noticed this week that the repair had been completed and that my laptop is being shipped back to me. I called Acer yesterday to find out what kind of repairs were performed. They told me that they had to replace the main board (motherboard). I should be receiving my laptop tomorrow in the mail. I’ll work with it for a while and let everyone know if the repair fixed the issue. Hopefully so. 

I have same problem, laptop doesn’t charge.
i contact Acer and they first send me new charger but still i have same problem. New charger doesn’t charge the battery.

i contact Acer again and yesterday they ask me send my laptop to them in Germany for repair. 

I bought a NITRO 7 (AN715-51) for my daughter (Grad School) and she has the IDENTICAL issue with the battery not charging, as many others have mentioned.   I called ACER support.  After complaining and begging, I finally got to a "top level" supervisor, who was KIND ENOUGH to send me a new (OEM ACER) battery which I installed (ain't that hard).  It solved the problem for a few weeks but then the problem returned.  My older son (her older brother) is a PhD Particle Physicist who researched this problem and "suggested" opening the case (again), unplug this new oem battery for a few (15) minutes and then replug and try.  It worked fine, but for how long?  Since I had retained the "original" battery (ACER support said NOT to return it), I tried THAT original one and it also charges now, as well.  ACER did not design this unit with a battery reset hole (seems like an arrogant oversight) which I believe might have mitigated this problem.  It appears to me, that somehow the ACER NITRO 7 system senses the battery being plugged in and "resets" somehow (electronically) when you unplug and then replug the battery in.  After reading all the on-line reviews, problems and suggested attempts at fixing this IDENTICAL problem, I posit that the BEST solution is to do the following:
With the charging cable UNPLUGGED, Open the case, Unplug the battery, Let it sit for a few minutes (press power on if you prefer to discharge the system), Replug the battery and retry the system. 
This is clearly an unacceptable "work around."  ACER technicians should identify and correct this battery-not-charging-problem, but that would require a significant amount of financial effort on their part, which I'm certain their attorneys will somehow find small print to defend them from accomplishing.  Shame on ACER is all I can say, after making such a beautiful, stylish and sophisticated piece of modern technology.
As may of us will be disappointed with this NITRO 7, I would be surprised if ACER has not lost a previously large and loyal fan base.  

ala202 said:

@JWA1979 Well I hope that works! I've been debating selling my laptop on ebay and getting back to lenovo because of this (though my trick of never unplugging or plugging in while it's off/hibernating/sleeping, doing the unplug battery when needed, is working). Once you've got it back, I'd love to know how it's working with the new motherboard, because if it does fix I'd like to have this laptop working before I start grad school.

It seems that the motherboard replacement that Acer performed fixed my battery charging issue. I can plug/unplug my computer when it's on or off and the charging system seems to work fine now. I hope that the fix resolved the issue for good. I'll update everyone if the charging issues returns. Thanks.