5 ms·

Yeah. When you install a new major OS, it's supposed to trigger a SMC reset and relearn the battery profile - which it sounds like it did for you on 10.9. Afte

Yeah. When you install a new major OS, it's supposed to trigger a SMC reset and relearn the battery profile - which it sounds like it did for you on 10.9. After calibrating it did indeed determine that, yes, you still had a failing battery. I'm not quite in the same boat as you - my machine is a MacBook Pro 2008 pre-Unibody. But I've been through the "Service Battery" warning on this 5 year old machine before. And they were right! Chemically, the battery had degraded and could barely hold a charge for more than 25 minutes. The machine would power off randomly without the 10 minute "charge me now!" warning because the power curve was so bad, it could never predict I only had 30 seconds left. Apple goes to great lengths to try to educate their consumers about how to protect the life of the batteries of their laptops: http://www.apple.com/batteries/notebooks.html http://www.apple.com/batteries/notebooks.html - Long term storage tips, maintenance tips, best practices, a little calendar reminder you can add to iCal to remind you to do these things, etc. http://support.apple.com/kb/HT1446 http://support.apple.com/kb/HT1446 - What you can do to increase your battery life, how to diagnose battery problems, etc. 10.9 itself! http://support.apple.com/kb/HT5873 http://support.apple.com/kb/HT5873 - Click on the battery icon. It will tell you what processes are running right now that demand high power. The Activity Monitor has a new "Energy" tab showing per-process power utilization. At the bottom are various charts and statistics about your battery usage. People abuse the hell out of laptop batteries by leaving the laptop connected to the charger all day, every day, like it was a desktop. They're perpetually 99%+ charged which stresses out the battery. The battery is meant to be used - use it! And like you, I'm not experiencing the issues in this thread under 10.9.

DigitalJack 13y ago
I leave my Mac plugged in perpetually, or nearly so. It's 53 months old and the battery is at 80% capacity. So instead of 7 hours I get 5.5 or whatever. It's not really noticeable yet. Maybe I'm just lucky. I had to replace my wife's macbook pro battery a month ago, same age as mine. Her's swelled up though, and was preventing the trackpad from clicking.
- fizzbar 13y ago
  80%...! Very impressive. What's the cycle count on your battery? My mbp is of a similar vintage, but after 900 or so cycles, the battery is down to 1700mah at "full". But w/ mavericks that's still about 2.5 hrs of runtime (1.75 hrs on Lion).
  - DigitalJack 13y ago
    170 cycles...due to mainly keeping it plugged in.
sneak 13y ago
> People abuse the hell out of laptop batteries by leaving the laptop connected to the charger all day, every day, like it was a desktop. They're perpetually 99%+ charged which stresses out the battery. The battery is meant to be used - use it! How do you figure?
- eigenvector 13y ago
  I've had my Dell Latitude docked 95% of the time for the last 4 years and when I do occasionally need the battery, it seems to run about the same as it did new. Your mileage may vary.
- jimboyoungblood 13y ago
  i've "abused" countless laptops over the years this way. none of them seem to have been affected negatively. in comparison, my wife routinely lets the battery on hers run close to empty- her last laptop could barely hold a charge for 5 min. http://www.marco.org/2009/09/24/laptop-battery-myths http://www.marco.org/2009/09/24/laptop-battery-myths http://www.apple.com/batteries/notebooks.html http://www.apple.com/batteries/notebooks.html

DigitalJack 13y ago

I leave my Mac plugged in perpetually, or nearly so. It's 53 months old and the battery is at 80% capacity. So instead of 7 hours I get 5.5 or whatever. It's not really noticeable yet. Maybe I'm just lucky. I had to replace my wife's macbook pro battery a month ago, same age as mine. Her's swelled up though, and was preventing the trackpad from clicking.

fizzbar 13y ago
80%...! Very impressive. What's the cycle count on your battery? My mbp is of a similar vintage, but after 900 or so cycles, the battery is down to 1700mah at "full". But w/ mavericks that's still about 2.5 hrs of runtime (1.75 hrs on Lion).
- DigitalJack 13y ago
  170 cycles...due to mainly keeping it plugged in.

sneak 13y ago

> People abuse the hell out of laptop batteries by leaving the laptop connected to the charger all day, every day, like it was a desktop. They're perpetually 99%+ charged which stresses out the battery. The battery is meant to be used - use it! How do you figure?

eigenvector 13y ago
I've had my Dell Latitude docked 95% of the time for the last 4 years and when I do occasionally need the battery, it seems to run about the same as it did new. Your mileage may vary.
jimboyoungblood 13y ago
i've "abused" countless laptops over the years this way. none of them seem to have been affected negatively. in comparison, my wife routinely lets the battery on hers run close to empty- her last laptop could barely hold a charge for 5 min. http://www.marco.org/2009/09/24/laptop-battery-myths http://www.marco.org/2009/09/24/laptop-battery-myths http://www.apple.com/batteries/notebooks.html http://www.apple.com/batteries/notebooks.html