Skip to main content

Released June 2012 / Core i7 processor with Turbo Boost / Up to 1 GB DDR5 Video RAM

559 Questions View all

New iFixit Battery is Recognized & Charging, then it isn't.

Here’s a run-down of everything that’s happened so far. Please help—I need my MBP to work!

Just bought and installed a new iFixit battery last night for a mid-2012 MBP unibody. Installation went fine (other than having some trouble getting the battery screws out, but eventually that worked out too).

Turned MBP on and battery was instantly recognized and began charging. Success! Or so I thought. Left machine on charger all night and planned on re-calibrating in the morning.

Woke up and went straight to computer. I can’t remember what the charge was when I woke the machine up, but I do recall that my external hard drives all showed “not ejected properly” errors. Thinking it was an issue with my USB hub, I unplugged the AC adapter to begin draining the battery as part of calibration. The MBP died almost instantly, if not instantly. Plugged AC adapter back in and re-booted computer.

Once rebooted, the battery meter showed that charging had stopped at 72%. Opened CoconutBattery and found all the stats to be at 0%. Closed CoconutBattery, checked power settings, then re-opened CoconutBattery and the app crashed. This suggests to me that something is screwy with the battery such that it’s causing CoconutBattery to panic and close itself.

Downloaded BatteryHealth2 from App Store as a replacement for CoconutBattery. BatteryHealth2 showed the same stats (72% charge, 0% health, 0 mAh charge, etc.).

Researched how to reset PRAM and SMC (because I forgot how to do it after a few years) and reset both, PRAM first and SMC second.

Restarted machine and voila! The battery is recognized again and resumes charging! All done, right?!

Wrong. Battery charges up to 97%, then the same issue re-occurs. Charging freezes, BatteryHealth2 stats are 0%/0 mAh, etc.

Here’s a screen-grab:

Block Image

Interestingly, BatteryHealth2 shows an age of 7.1 months, which seems reasonable—almost as if it knows there’s a “young” battery inside, but unable to determine anything else about its health or current charge.

Anyway, having now reset the PRAM, reset the SMC, and checked two different battery management apps, what are the next steps? I’ll be leaving this on the charger because I’ve got work to do today and the only way this machine stays on is if I leave it plugged into the wall. All your help is appreciated—I’d buy you all a round if I could!

UPDATE:

I did a second, immediately followed by a third, SMC reset. The battery is recognized/alive/whatever again, at least for now. Not sure if this changes things, but here’s a screen cap of BatteryHealth2 with a working battery:

Block Image

Thanks for your continued help.

UPDATE #2:

After about 5 minutes, the battery “died” again.

Block Image

UPDATE #3:

Mayer asked me to reinstall the old, original battery and post CoconutBattery screencaps. Ask and ye shall receive. Note, I did not reset PRAM or the SMC. It just worked immediately. Does this tell you anything? Because I’m really at a loss.

Block Image

Block Image

*Edit: Fixed typos, nothing substantive.

*Edit 2: Added update

*Edit 3: Added update

*Edit 4: Added update

Answered! View the answer I have this problem too

Is this a good question?

Score 0

Comments:

What was going on with the old battery and why did you replace it?

by

Add a comment

2 Answers

Chosen Solution

Put the old battery back in and run Coconut Battery and show us the results please.

Was this answer helpful?

Score 1

Comments:

This is done. See Update #3 above.

by

That battery seems to be working just fine. Try calibrating it just like you planned to do with the new ones and lets see what it does.

by

I mean, this thing is seven years old. It's been through a lot of cycles. The OS is advising I get "service" for it. I want to know why a brand new battery isn't performing properly, because this old one is going to check out one day. What're your thoughts?

by

That "old" battery only has 136 cycles out of an expected life of 1000 cycles. Is the new battery showing the same service battery code, or will it boot? The disks not erectly properly tell me the machine was not shut down properly if at all. You would get this error from a power failure during the night and an automatic restart.

by

This is not helpful. I bought a new battery. I expect a new battery to function properly, and it isn't. Whether the old battery is working or not is a non-issue.

by

Show 1 more comment

Add a comment

Seems like you got a bad battery. Just look into a RMA with iFixit. Im sur given your proof theyll assist you.

Was this answer helpful?

Score 0

Comments:

Is this a common problem with iFixit batteries? I appreciate your answer and your assistance, but isn't it possible there's another issue? Or is this a fairly common occurrence and a new battery is just the way to go?

by

@dorner2011 No this is not a common problem and assume you got a bad battery is premature. What was going on with the old battery and why did you replace it?

by

The old battery was the factory original. It had a "Service Battery" status, so I chose to get a replacement. I still have the original.

by

Add a comment

Add your answer

Drew Dorner will be eternally grateful.
View Statistics:

Past 24 Hours: 0

Past 7 Days: 0

Past 30 Days: 0

All Time: 103