MacBook battery drops capacity very fast
Hi all
One month ago bought this MacBook from eBay (MacBook Pro mid 2014 with i7 2.5GHz).
It looks like battery was replaced and was only 4 cycle count when I got the system. I’m checking battery health every day and it’s drains very fast. Was 9100 mAh when received and now has aprox 8400 mAh from normal use (not hard). I now have 40 cycles after 38 days of usage.
It looks like battery lasts, but why it drops mAh so quickly can’t understand. lost more than 700 mAh and is continuing,
If I turn on music on YouTube CoconutBattery shows much lower mAh 8100-8200 and do you have any idea what’s going on? is it normal capacity drop? maybe battery needs calibration?
Update (05/23/2021)
I bought MagSafe 2 charger directly from apple so it’s original and there is no problem with charger. all contacts are clean. capacity jumps between 8100 and 8500, one week ago was 8800mah and 100% health, i’m assuming after two month battery will need replace.
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In both of your CoconutBattery snapshots your charger is not connected! So you are not charging! The MagSafe cord LED needs to be Green for a charged battery and is Amber when its not!
At this point you likely have a damaged logic board charging circuit as you are just running the battery down. This is not a Battery issue this is either a bad charger, dirty contacts or damaged logic board.
por Dan