hey guys i did search some help articles but none seem to solve my issue. I have a macbook pro 13" late 2011 i use it mostly on power supply but 2/3 times a week while traveling its used on battery supply. The issue i have been having has cropped up about a month back, if i use my macbook on battery supply for an hour or so and then connect my charger it doesn't detect it and neither does the indicator on the magsafe port light up, I've checked in the system info and neither is a charger detect there as well, i kept connecting the charger a few times but nothing helped eventually the battery got discharged and my macbook shut down i kept the charger plugged in but only after an hour it displayed a green light and finally changed to amber and i could boot up. Few days later when i used it on the battery the same issue occurred so i resetted the smc but nothing happened the battery discharged and even after 4 hours it did not detect a charger so i plugged in the charger from my other macbook and at once it detected it but the indicator light was on green for some time and eventually changed to amber. Few days later again the same issue occurred and the charger from my old macbook as well wasn't detected so i connected the one i was using previously and it worked but the indicator light stayed on green for some time. Then again this issue occurred and the old charger worked again in the same way. i found out whenever this issue occurs and i switch chargers the issue goes away and both chargers are detected well, have used both these charger on the other macbook and found no issues at all. If i use the battery for 10-20 minutes the issue does not occur. Coconut battery says my battery is at 95% of its designed capacity i.e 5508 mAh/5770 mAh. When i got my macbook new the capacity shown dropped to 98% after 10 load cycles I re-calibrated the battery a few times but it does not change the battery capacity. The battery has 65 load cycles on it. what do you guys feel is the issue? the mag safe board or the battery it self? Ive got the latest efi updates and other updates but the issue still occurs. thanks for your help guys.