Chosen Solution
After replacing the battery (bought on ifixit.com) according to the step by step guide, my macbook pro 13 early 2011 often stops abruptly when it is not connected to the power adapter regardless of the charging level. I believe I did everything correctly. I have already reset the SMC and calibrated the battery, but I didn’t solve the problem. Could anyone help me please?
my advise is put the old battery back and see if still doing like that. if it’s not .. then the battery is the problem and also try to change the charger, from your friend to test it about 30min and unplug it to test. and the luckiest one if you have friend that can give a test his battery to you. but i think is your new battery defected goodluck
