Macbook Pro 2011 charging behaving weird. Charges and stops repeatedly and takes very long. Help?

Question

So a few weeks ago my MacBook Pro 2011 started having charging problems.  I would use it normally.  Then plug it in to charge anywhere between 5-20 percent like I've been doing for the past year that I've had it (since August 2011).  Anyway, what happens now is that it charges but extremely slowly - at least 4 hours to fully charge as opposed to the 1 1/2 to 2 hours that it used to take.  Also, it seems to be draining a lot quicker than it used to while only browsing the internet.  Furthermore, while charging, the battery meter goes from the percent its charged to to "not charging" back and forth.  What's going on?  Is there a problem with my battery, my computer, or the magsafe charger?  [please refer to the pictures below to get a better understanding of my problem - these pictures were taken over a 2 hour time period - a time period that usually is enough to charge my computer] - if you'll notice, in the first two pictures, the percent barely went up by 10 in a half hour period:
Here are my Mac power stats:
Battery Information:
  Model Information:
  Serial Number:-----------
  Manufacturer:          SMP
  Device Name:          bq20z451
  Pack Lot Code:          0
  PCB Lot Code:          0
  Firmware Version:          406
  Hardware Revision:          2
  Cell Revision:          158
  Charge Information:
  Charge Remaining (mAh):          6156
  Fully Charged:          Yes
  Charging:          No
  Full Charge Capacity (mAh):          6393
  Health Information:
  Cycle Count:          343
  Condition:          Normal
  Battery Installed:          Yes
  Amperage (mA):          -1607
  Voltage (mV):          12182
System Power Settings:
  AC Power:
  System Sleep Timer (Minutes):          25
  Disk Sleep Timer (Minutes):          10
  Display Sleep Timer (Minutes):          15
  Wake on AC Change:          No
  Wake on Clamshell Open:          Yes
  Wake on LAN:          Yes
  Display Sleep Uses Dim:          Yes
  GPUSwitch:          2
  PrioritizeNetworkReachabilityOverSleep:          0
  RestartAfterKernelPanic:          157680000
  Standby Delay:          4200
  Standby Enabled:          0
  Battery Power:
  System Sleep Timer (Minutes):          20
  Disk Sleep Timer (Minutes):          0
  Display Sleep Timer (Minutes):          15
  Wake on AC Change:          No
  Wake on Clamshell Open:          Yes
  Current Power Source:          Yes
  Display Sleep Uses Dim:          Yes
  GPUSwitch:          2
  Reduce Brightness:          Yes
  RestartAfterKernelPanic:          157680000
  Standby Delay:          4200
  Standby Enabled:          0
Hardware Configuration:
  UPS Installed:          No
AC Charger Information:
  Connected:          No
  Charging:          No
Does anyone have any idea what the problem may be?
Thank you,
macstr

Answer 1

try doing a SMC RESET and see if that sorts it out for you.
if doesn't work - better take it to Apple and have them look at it before something else goes wrong...
good luck - hope you get it sorted out..