I know there are many battery/charging questions here, but I think this may be a new one. My apologies in advance if its not. Last night when I went to charge my 2010 MBA no light was present on the MagSafe adapter and it wouldnt charge. I unplugged it and plugged it back in again and it worked. After using my MBA without incident in some meetings this morning, I got back to work and again it wouldnt charge with another MagSafe adapter I have at my office. I tried resetting the SMC, but nothing happened and different outlets also had no effect. After about 30 minutes it started charging again and after that I think I reset the SMC successfully due to the light changing on the MagSafe adapter during the process. Its charging fine now, but since two adapters didnt kick in with charging right away Im wondering if I should be worried that this is indicative of a pending hardware problem. Has anyone had a similar experience?