battery indicator always says 50%

If you go to About This mac, More Info, System Report, Hardware, Power, what does the report say about the battery, its Condition, Capacity, remaining charge, Cycle count, Voltage? If the battery is Normal and all other prarameters are as expected for a battery of that age and cycle count, then there could be something going wrong in the charge reporting. Does the remaining charge to capacity ratio equal the reported battery charge?

Hi Gambo74, i have a similar problem with the battery indicator stuck on 47%, and nit correctly reflecting the reaming/charging time.

in apple store the run an MRI scan and found no problem with the battery or the adaptors.

Look like you find the way to solve the problem. Great !

where can I find the "powermanagement plist" (files ?) i have to delete ?

thanks

Rzo

/Library/Preferences/SystemConfiguration/com.apple.PowerManagement.plist

That's the Library at top-level, not inside your Home folder.

Thanks ,

Unfortunately in my case the battery indicator keep showing 47%

Time to get a new battery. Mine did the same thing, then decided to not hold a charge anymore.

yes i did restarted the computer

Before assuming I don't know what I'm doing, don't make comments. I'm simply stating what I had in my personal experience. I researched other options, but no fixes worked. I even called in to Apple, and they had no suggestions. Generally when the battery life goes down to a point that it can no longer be charged (battery memory), the only way to fix it is to discharge it completely, and even that sometimes doesn't work. I was relating this thread to my own experience.

Thanks you very much all for your comments and suggestions.

According to the "MRI scan test" that was performed on my Mac in the local Apple lab few days ago, the power adaptor and the battery are operating ok, and that the battery in charging. The technical guys there suggested to performed a battery calibration (http://support.apple.com/kb/HT1490 ), i'm doing that now for the 2^nd time.

My first assumption when the problem started was that I have to replace the battery, but the guys in the Apple lab was not sure that replacing the battery will solve the problem, as It may be a problem in the "software" or some communication interface between the software and the battery hardware.

After charging for say 2 hours, I can run on battery for few hours, this I think also an indication that the battery is charging OK.

I'm currently in the charging stage of the calibration process, so I will send you later today the information your required. Nevertheless as far as I remember :

1. The com.apple.PowerManagement.plist I removed was certainly under the /Library/Preferences/SystemConfiguration/ (or one of its sub dirs) and not under my home dir.
2. As to the System Report on the Power supply under my Mac, I don’t recall all the details (I will send it later today), but I looked at that in several occasions, and was also examined by the Apple technician in Apple lab and the battery look normal as expected/
3. Does the remaining charge to capacity ratio equal the reported battery charge? => NO !. that I think is the main problem !

The indicator is ALWAYS stuck on 47% , the timing reaming can fluctuated from 20 hours to 45 minutes regardless of the actual remaining time.

During charging the indicator show "47% charging" And after a about 2 hours it change to "47% Full"

Thanks

Razo