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My macbook battery is 94% charge , condition is normal and cycle count is 30 , it used to work fine a couple of days ago . now computer won't boot on if not connected to power and if I disconnect power it shuts down .

how do I make sure that battery is or is not dead ??

Edit1:

also when the charger and the battery is connected its not stable and reboots.

if the battery is disconnected , it doesn't reboot ( but I think something is up with the performance ) .

Edit 2:

its a macbook pro 2011 specs with 16G of ram.

I also did a hardware diagnostic without the battery and no problems were found.

  • What is the model/release date of your MacBook? Is it one of the old white ones or the new 2015+ release? – www139 Sep 26 '17 at 1:34
  • @www139 please review edit 2 – aeid Sep 26 '17 at 4:20
  • Is the battery the original that shipped with the computer? If so, I would guess the battery is bad. I've seen this before. Sometimes, as a battery fails, it returns an inaccurate cycle count and charge level. My guess is, most likely, your battery has failed. Most certain possible if the battery is the original. – www139 Sep 27 '17 at 18:50
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    Battery went bad . It was fake I think – aeid Oct 31 '17 at 20:14
  • that's terrible but believable. Also, there are methods of properly initializing the battery. Some require draining to nearly 0% on the first cycle and others function best by charging to 100% on the first cycle. Good luck. – www139 Oct 31 '17 at 20:16

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