Dell XPS 15 Charging Issue

Hi there! I have a near-year-old Dell XPS 15 L502X laptop which has been giving me grief over the past few months, namely in the form of a 9-cell battery that gives a "plugged in, not charging" string of errors. (Also, I'm running Windows 7)

Here are the issues I'm encountering:

(1) Upon startup, in white text on a black screen (appears after the loading screen with Dell logo, prior to Windows starting up screen):
"The AC power adapter wattage and type cannot be determined.
The battery may not charge.
The system will adjust the performance to match the power available.
Please connect a Dell 130W AC adapter or greater for the best system performance.
Strike the F3 key (before F1 or F2 key) if you do not want to see power warning message again.
Strike the F1 key to continue, F2 to run the setup utility."

(2) Upon login, in a warning notification box from "Quickset"
"The AC power adapter type cannot be determined. Your system will operate slower and battery will not charge. This problem might be solved by:
-Ensure the plug is inserted completely for best system operation.
-Connect a Dell 130W AC adapter or higher." 

(3) When mousing over the battery icon:
"xx% available (plugged in, not charging)" where xx is a number depicted percentage battery remaining

(4) Dell "Battery Meter" information box (accessed via battery icon->more power options->Dell battery meter (left hand link))
"Battery Charging Disabled"

(5) BIOS (F2 setup utility) information
"AC adapter type: unknown" -- Accessed on the "Main" tab
"Adapter warnings: [Enabled]" -- Accessed on the "Advanced" tab
"Charger Behavior: [Enabled]" -- Accessed on the "Advanced" tab

Here is some information regarding my (unsuccessful) attempts to resolve the issue:

(1) BIOS have been updated to A11 (latest version).
(2) Laptop runs on battery alone, charger alone, and with both at the same time.
(3) Battery and charger are both the ones received new from my purchase from Dell.
(4) Cables appear to be in good condition, and are firmly seated.
(5) Dell Quickset was uninstalled and a fresh new version downloaded and re-installed.
(6) In the Device Manager, underneath "Batteries", the "Microsoft ACPI-Compliant Control Method Battery" has
been uninstalled, reinstalled, enabled, and disabled multiple times (including different times with varied restarts).
(7) One system of steps to solve the issue I attempted, and had success with once (but failed to work the past few times implemented) was:
 - Disconnect the AC
 - Shutdown the computer
 - Remove the battery
 - Reconnect the AC
 - Startup the computer
 - Uninstall the ACPI-Compliant Control as listed in (6)
 - Shutdown the computer
 - Disconnect the AC
 - Insert the battery
 - Connect the AC

At this point, I'm at a loss as to how to resolve this problem without buying replacement hardware, which I would really like to avoid. I've furiously searched through multiple forums of "solutions," but haven't been able to find one that completely resolves the issue. Any help or advice would be greatly appreciated.

Thanks, and have a fantastic day!