HP Pavilion dv6-2190us Notebook PC Battery Won't Charge & Will Now Only Run on AC Power

Question

OS: Win7 (64-bit)
Serial #: [Personal Information Removed]
First off, I will say that the main battery I am using is not an HP OEM battery, however, it has been verfied to work and charge correctly in another family member's dv6 notebook.  Furthermore, I have access to an HP OEM battery, from a family member's dv6, with which I have confirmed the same issue.  FYI: I replaced my OEM battery about a year ago with an aftermarket battery when my OEM battery stopped holding a charge.  This happened after before my laptop was 2 years old. 
So, here's a description of the problem.  About a month ago, even though my laptop was plugged in to the AC adapter, the battery stopped charging.  The laptop continued to work until the battery completely ran out of charge.  Once that happened, the laptop shut down, DESPITE still being connected to the AC adapter.  At this point, as long as the battery was installed in my laptop, with the AC adapter still connected, it would not power up.  The only way I could get it to power up was to remove the battery.  Then, it would boot up just fine, but of course, I was now tethered via the AC cord, turning my laptop into a "thin and light desktop".  If I attempted to put the battery back while the computer was on, connected to the AC adapter, it would shut down IMMEDIATELY.  I took the battery and plugged it into my family member's dv6, at which point it charged just fine and worked normally.  I then took the charged battery and put it back into my laptop only to have the same sequence of events repeat, i.e. laptop ran off of the battery despite the AC adapter being plugged in until it ran out of charge...had to remove battery to get laptop to start back up.  I have also confirmed the exact same behavior with the HP OEM battery out of my family member's dv6.  So, in a nutshell, it would appear as though my laptop has lost the ability to charge batteries and cannot resolve the fact that the AC adapter is plugged in when a dead battery is installed.
It should be noted that despite the normal operation of my family member's dv6 with my battery and the normal operation of my laptop with just the AC adapter plugged in, I did verify (via a multimeter) that the voltage of the batteries were within normal operating range and that the voltage and current flow of the AC adapter was within normal operating range. 
Is there a separate charging circuit inside the dv6 for charging the battery?  Is it separate from the motherboard and possible to replace?  I've done quite a bit of research on this issue (or very similar issues) and despite some suggestions RE: BIOS issues, I just can't see how that could be the culprit.  Nor can I see how "re-calibrating" my battery would address this problem.  Note: battery does register at 100% when charged in the other dv6 and put back into my dv6.
Ok, I hope that clearly explains the issue.  Please let me know if I can provide any further details to help troubleshoot it.      
Thanks,
Eric

Answer 1

Okay, so the type of battery you have is designed to last approximately 1 year (see link below) it has lots of links to other useful docs too.
http://h10025.www1.hp.com/ewfrf/wc/document?docname=c00596784&cc=us&dlc=en&lc=en&product=4121239&tmp...
HP & other companies do sell Long life batteries but they cost more.
We would ask you to put the unit in our unit and run Battery check which is inside HP Support Assistant, make sure you have the latest version, same for your BIOS Version.
You will see there are bunch of tips on how to make your battery last longer, but you really need to start doing them from the start, if your battery is already 1 year old there is a good chance it is low enough on it's capacity to require you buying a new one.
You should check out our site, they often have sales, and Batteries would be under accessories.
Check out other sites too, compare.
Good luck.
I am an HP employee
Knowledge is power...Power to the people