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1.7 GHz dual-core Intel Processor (Turbo Boost up to 2.6 GHz) with 3 MB shared L3 cache

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Replacement battery dying within 2-3 hours despite calibration

Last week, I replaced the battery on my 11” mid 2012 MacBook Air. I charged it completely, then used it on battery power until it shut off, then left it for 5+ hours as is recommended for calibration. The battery is still dying after 2-3 hours and the % left is not accurate (eg it will go from 45% or so down to 7% and then sit at 7% for a while. It has gone down quickly to 7% specifically multiple times.)

I did try calibrating it again and reset the SMC but I haven’t noticed any improvement. Is there something I’m missing?

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Can you download Coconutbattery with the MagSafe charger connected take a screenshot of the main window and paste it here for us to see.

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Done! Thank you for taking a look at the issue!

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I added a screenshot from another app (iStat Menus) showing the battery health at 88% and that it's going to take 1 hour to charge from 85% to full charge.

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Well, your battery & charging logic looks good so I can't see the battery as the issue.

I think you'll need to look at your OS settings and what you have running thats consuming your systems power. Locate the App 'Activity Monitor' in your apps folder see if you can isolate out whats running that shouldn't be.

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Thank you! I had some old adobe programs running in the background so I uninstalled them, it seems to be running better now. Thank you for your help!!

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So I've taken care of some programs that were running in the background and am cleaning up large files and such, but I've been on the computer (with the screen dimmed to half brightness) for 2 hours this morning and I'm at 33%.

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Problem Solved:

I tried to clean up the drive after uninstalling some vampire programs in the background didn't help. Didn't make a dent (battery life still ~2 hours), so I backed up my drive with Time Machine, then erased it, and reinstalled the OS which ended up being Mountain Lion (#tbt). I had some issues because I had two factor verification on and Mountain Lion could not handle it, so I ended up using my phone to deactivate that and then being able to update to High Sierra. Once that was complete, I had some issues with the local keychain dialogue box coming up and requiring my password but not accepting it. I found a solution that worked for me Here

The directions I followed:

"Open Finder. Choose Go -> Utilities. Locate Terminal and Open It. In Terminal, type the following command:

cd ~/Library/Keychains and Press ENTER

then type ls and press ENTER to list the contents of the Keychains directory. You will see a long string with random numbers.

[In the little video loop he then types ls -al (but forgets in the text to mention this, which is a critical step turns out lol)]

Type rm -rf then type the first three letters or numbers in the long string as you see and press the TAB key to get the full name of the folder. Press ENTER. Repeat the steps, if there are more then one folders of this type. "

Battery life is estimated to be about 5-6 hours now. I haven't restored my back up and I may not, might just get things off my external or iCloud as needed.

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