14 Replies Latest reply: Feb 23, 2014 4:25 AM by andyBall_uk
John Coffee Level 1 Level 1 (15 points)

I recently got a new battery for my 2007 Macbook Pro 3.1. Whenever I'm running on battery, the Macbook gives me a warning at 10% remaining battery life and loosed power all of a sudden when reaching 6..9%. All work is lost, when I reconnect the charger cable the Macbook restarts completely and doesn't just wake up from sleep.

 

 

Questions:

- How can I calibrate the battery correctly if a complete shut down happens before reaching 0% (as I understand the calibration procedure I need to discharge the battery from 100% to 0% in one go)

- Can a faulty PRAM battery cause this problem?

- Can I check the status of the PRAM battery?

 

 

Thanks for any help

 

John


MacBook Pro with Retina display, OS X Mavericks (10.9)