Original post by: originalmachead ,
If this is a cheap chinese knock-off not from Apple it could be the battery.'' Batteries are know to be "bad right out of the box" - ''contact your vendor. Apple has been know to have had a bad batch of batteries. And yes gunk builds up in the end of the magsafe... you can'' clean it when unplugged with and old tooth brush and some 99% alcohol... some dielectric contact cleaner is good too,'' let it dry for hours before using. Check the in port on the laptop too - crap builds up in there ''If this Answer is helpful '''please remember to return and mark it '''Accepted.''