MBP shuts down on AC power

sorry for the long post.
Got my mbp back from apple with new logic board and battery after repeated kernel panics. 2nd day in after running new battery down to about 20%, plugged into AC and poof, mbp shuts down. Will not boot up while plugged in. Installed secong battery and boots up fine. BUT, after this battery goes down past 30% and upon plugging into AC mbp shuts down again.
Pulling battery and running on AC alone works fine, but cannot work while charging. Must keep it off and charge until green light on magsafe.
Weird info on power settings on "brand new" battery from applecare:
System Power Settings: NOTE:(amperage (mA)is in negative)
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 180
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 60
Disk Sleep Timer (Minutes): 180
Display Sleep Timer (Minutes): 60
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: No
Reduce Brightness: No
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 6744
Remaining Capacity (mAh): 1651
Amperage (mA): -3356
Voltage (mV): 10356
Cycle Count: 5
AC Charger Information:
Connected: No
Charging: No
i think this battery is possibly bad.
here are the settings for the older secondary battery:
(fully charged and while plugged in)
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 0
Disk Sleep Timer (Minutes): 0
Display Sleep Timer (Minutes): 180
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Display Sleep Uses Dim: No
Battery Power:
System Sleep Timer (Minutes): 60
Disk Sleep Timer (Minutes): 180
Display Sleep Timer (Minutes): 60
Wake On AC Change: No
Wake On Clamshell Open: Yes
Display Sleep Uses Dim: No
Reduce Brightness: No
Battery Information:
Battery Installed: Yes
First low level warning: No
Full Charge Capacity (mAh): 4477
Remaining Capacity (mAh): 4423
Amperage (mA): 0
Voltage (mV): 12536
Cycle Count: 130
AC Charger Information:
Connected: Yes
Charging: No
any help/suggestions?
will probably be sending back to apple, have ext. warranty, macmall guys have no clue, I have zapped pram and reset smc to no avail. Wil work until battery gets low, then shuts down agai upon AC connection. magsafe is clean/no prob w/pins.
tia
craig v butler

Took in to apple store. They replaced the logic board [again] and the whole power connector assembly for the ac adapter. Also the left fan and the temperature control gauge(?)
Well that's it folks! We're back up and running now!
thanks for the views and replies.
craig v butler

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