Macbook battery complete sensor (stop charging when it is complete without unplugging)

Is it still continue charging when it is fully charged (when the green light is on)? or is there internal sensor which automatically stops charging after it is complete regardless it is plugged.

Thanks, one nore question: My battery is lasting maximum 2.5-3 hours when it id fully charged. It has been less than a year and it supposed to be around 7 hours. System report:
Battery Information:
Model Information:
Serial Number:          D862375078SDKRNAL
Manufacturer:          SMP
Device Name:          bq20z451
Pack Lot Code:          0
PCB Lot Code:          0
Firmware Version:          406
Hardware Revision:          000a
Cell Revision:          162
Charge Information:
Charge Remaining (mAh):          3674
Fully Charged:          No
Charging:          Yes
Full Charge Capacity (mAh):          5937
Health Information:
Cycle Count:          238
Condition:          Normal
Battery Installed:          Yes
Amperage (mA):          3455
Voltage (mV):          8151
System Power Settings:
AC Power:
System Sleep Timer (Minutes):          10
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          10
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
Wake on LAN:          Yes
AutoPowerOff Delay:          14400
AutoPowerOff Enabled:          1
Current Power Source:          Yes
DarkWakeBackgroundTasks:          1
Display Sleep Uses Dim:          Yes
PrioritizeNetworkReachabilityOverSleep:          0
Standby Delay:          4200
Standby Enabled:          1
Battery Power:
System Sleep Timer (Minutes):          15
Disk Sleep Timer (Minutes):          10
Display Sleep Timer (Minutes):          14
Wake on AC Change:          No
Wake on Clamshell Open:          Yes
AutoPowerOff Delay:          14400
AutoPowerOff Enabled:          1
DarkWakeBackgroundTasks:          0
Display Sleep Uses Dim:          Yes
Reduce Brightness:          Yes
Standby Delay:          4200
Standby Enabled:          1
Hardware Configuration:
UPS Installed:          No
AC Charger Information:
Connected:          Yes
ID:          0x07a1
Wattage (W):          45
Family:          0x0085
Serial Number:          0x00353d80
Charging:          Yes

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Im not quite sure whats wrong with your notebook
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CAUSE: Both times, this happened when I let the battery run down too much. I was playing a game or listening to music and ignored the low battery warnings thinking I could push it and eventually the iphone shut down. No problem, I thought. I can just plug it in and keep on going. But when I plug it in, the iphone won't charge ... like it normally does. I get the red battery meter and the plug and lightning symbol as previously described. The phone won't turn on. I tried resetting it several time - hard resets as well - with no response. Always to the screen with the red battery.
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Message was edited by: eleraama

I don't think the battery is your problem. Here's things to check:
Try using another MagSafe adapter and see if that helps.
Make sure the connectors between the MagSafe adapter & the computer is clean, as well as the connectors between the battery and the computer.
Sounds to me like you have a problem inside the computer and that's why it won't run on battery power.
~Lyssa

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Macbook battery complete sensor (stop charging when it is complete without unplugging)

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