Level 1

40 points

shut down with no warning 49% battery left.

Macbook Pro 15".

This is a brand new battery. I bought it because I was told my laptop was shutting down early with no warning because the battery was bad. Well, this is a new battery and it's doing the exact same thing.

I have NEVER had a warning prior to shut down. And it doesn't go to sleep. It completely shuts off with NO warning and I lose anything I was working on at the time.

There is no way I can recalibrate it according to the many posts already about this problem. They all suggest recalibrating the battery by running off the battery and waiting for the low power message. There is no message. And I can't run the battery down because it won't go down past 49%. Or at least that's what the computer is showing.

Since this is not a battery issue I'm thinking that this is a software issue. Something that happened with one of the leopard updates.

So what now? What can I do software wise to repair or update the battery sensing part of my software?

MacBook Pro 2.0, Mac OS X (10.5.8)

Posted on Oct 28, 2009 10:14 PM

42 replies

Feb 5, 2010 6:29 AM in response to Mary Laiuppa

Is possible that the new battery contains dead cells out of the gate? I would try a second new battery. Obviously, it may very well be something else, however, it is possible that the new battery was DOA.

This may not be the same problem as everyone else, but I had an issue with my MBP17 shutting down abruptly. I found it was because of dead cells in the battery. This is my understanding:

Essentially, if your battery has a bad cell, the SMC needs to know about it so it can skip it when on battery power. The battery "training" recommended by AppleCare is supposed to do just that. Unfortunately, I could not train my MBP because if I left it for more then a couple of minutes, it would attempt to enter a power save mode (which would abruptly shutdown my computer). I ended up replacing the battery and then properly training it. I have not had a problem since.

Feb 9, 2010 10:50 AM in response to Mary Laiuppa

this has been happening to me too. i recently updated to snow leopard. my trackpad is not working well either both issues started around the same time. my sys profile says for me to check battery. would that affect the trackpad? cycle count is 290.

Feb 9, 2010 8:51 PM in response to Mary Laiuppa

I've been watching this thread for a while. Well, I threw myself on the mercy of the Genius bar. Even though my two batteries are out of warranty, the genius ran a test that confirmed that the batteries were quite dead with unusually low cycle counts. So I left the Apple store with two new batteries. I had been stalling since I knew they were out of warranty anyway and didn't want to spend the money.

If you have access to an Apple store, it might be worth a try.

BassoTim

Level 1

12 points

Nov 3, 2009 5:58 PM in response to 1tdjww

I have the same issue that without warning the battery shuts down my MacBook Pro. Today the battery life when I started it up again was around 48%.

BassoTim

Level 1

12 points

Nov 14, 2009 11:49 AM in response to JockeS

At least you are still under warranty- just take it in and they will replace the battery.

I'm going to have to buy one 😟

Joe Ivko

Level 1

4 points

Nov 28, 2009 4:35 AM in response to Mary Laiuppa

I have the same problem. MacBook Pro, Snow Leopard, and all updates. I had no issues until with the battery until the Snow Leopard update. Battery shows normal health in system profiler.

Kappy

Level 10

362,007 points

Nov 30, 2009 1:25 PM in response to Cutter6666

No one from Apple tech support reads the Discussions. The Discussions is strictly a user-to-user group of help forums. If you want tech support call AppleCare.

CMCSK

Level 6

11,452 points

Nov 30, 2009 5:44 PM in response to BMcNarry

Condition: Check Battery

Your battery is on the fritz. Take your computer to an Apple Store. The staff will be able to check to determine if your model MacBook Pro qualifies for a free battery.

Kaalass

Level 1

8 points

Nov 30, 2009 6:03 PM in response to CMCSK

Thanks! I reset the SMC, so now I will wait to see if it does anything. I will keep you posted!

CMCSK

Level 6

11,452 points

Nov 30, 2009 8:33 PM in response to Kaalass

Yes, please do.

Dec 1, 2009 11:23 AM in response to Mary Laiuppa

I have the same problem, so I bought a new battery. The new battery did not help, as I got a shutdown with 75% remaining. I hope someone can help!

Jan 9, 2010 11:46 PM in response to Rod Hagen

Even you're right on the old age of my battery, how do you explain why some new batteries have the same problem please?

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shut down with no warning 49% battery left.