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 ??
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 ) .
its a macbook pro 2011 specs with 16G of ram.
I also did a hardware diagnostic without the battery and no problems were found.