New Battery Charge Level Incorrect
I ordered a new battery from this site (MacBook Pro 15" Unibody (Early 2011 through Mid 2012) Battery) for my MacBook Pro 15" Early 2011.
After putting the new battery in, I pushed the battery charge level button to see how much it was charged. It showed 4-5 lights. I powered on the laptop and OS X showed the battery charged at 45% and that it would take 2-3 hours to fully charge. I disconnected the power cable and it immediately shut down.
Seems to me the battery charge level is completely off. I let the battery charge fully, and got about 36 minutes of usage time before the laptop shut itself down. I reconnected the power cable and powered back on my Mac, and it showed the battery level at 75%, charging!
So what's the deal? Is the battery defective? The sticker on it from iFixIt showed 0 cycles.
Here are the Coconut Battery results. If I charge the battery up fully (94% or so), it will last for about 20 minutes before suddenly shutting down. I went through three cycles of that yesterday, and it seems to last 20-30 minutes each time. Plugging it back in starts it up again right away.
The web results seem to have a mix of data from old battery and the new one, don't know if that helps:
Is this a good question?