Q: Mavericks - power use / service battery

Believing the Systeminformations, my full capacity charge dropped further down to 5147 mAh during the last 7 or so hours, without even unplugging from power supply... That's just wrong....

Hi y'all.

I own a late-2009 Macbook laptop. Preivously, I was running Lion on the computer and wanted to improve battery performance. I read that Mavericks would help with battery life but it's actually been worse.  And tonight, the 'Service Battery' came on. Not happy.

It appears to be a known bug and if so then no doubt Apple will be addressing the issue asap.

Cheers

Pete

Same issue here.  MacBook Pro 7.1 (mid-2010) and upgraded to Mavericks, service battery warning is now showing. Battery life dropped significantly as well.  Lucky to get 2.5 hours now.  Horrendous. Thanks Apple.  I'm was already thinking it's time to upgrade my laptop and now I definitely am - and a new Macbook just dropped further down in my list.

I'm also affected by the power button bug as well.  It just makes my screen go black.

UPDATE:

I did an SMC reset and the Service Battery notification went away.

Here's how to do it:  http://support.apple.com/kb/HT3964

Yes, I did notice a dramatic decrease of time usage with my mid 2013 MBA 13". When I just purchased it, the 12 hours battery life was true and incredible. Now, if I get 7 hours, it's good. It's still great, but much less than the anticipated 15 hours with Mavericks.

I have the exact same problem. "Service Battery" message appeared after the update. Everything was fine before Mavericks on my early 2011 MacBook Pro 2010 13". I have 362 cycles on my battery, and not the 1000 listed here: http://www.apple.com/batteries/notebooks.html.  Also, battery won't charge to 100% now - gets stuck at 99% and discharge 5% every minute. Needless to say, I'm really disappointed about this!

Apple is having a "VISTA" moment don't waste your time recalibrating battery or reseting smc. All we can do is wait for a fix.

For anyone that's tracking this thread, here's the latest on my battery.  I'm posting this as it appears to be recovering.  Perhaps Apple updated the calibration algorithm for the battery and it just takes a few cycles to get back to where it once was.

And low and behold, this morning my Service Battery alert went away, all on it's own.  No need to reset SMC/PRAM etc.

Here's the pic from Coconut battery:

For some reason, I was seeing my WD passport for mac behaving strangely; the indexation was always running and never stopped. I decided to check WD website. After applying the june firmware update (http://www.wdc.com/wdproducts/wdsmartwareupdate/firmware.asp?id=wdfMP_forMac&os= MAC), everything seemed to go back to normal.

Having exactly the same problem with an MacBook Pro 8.2 for first time some days after a clean Mavericks installation.

I dont have a 2nd internal HD installed.

We need an answer from Apple.

Haha!  After my post yesterday afternoon saying that "Service Battery" had disappeared, it's back!

I had been disconnected from the charger for a few hours then hooked it up overnight.  While checking this thread for updates I looked at my battery stats and there she is........ "Service Battery".

My battery is a hypochondriac.

The SMC reset found on http://support.apple.com/kb/HT3964 seems to have cleared up the fluctuating capacity issues for me. The battery does still seem to have lost some capacity since I've upgraded but the percentage indicator has gained its accuracy back.

This was performed on a Late 2008 Aluminum Macbook with OS X 10.9.

My mid-2011 13" Air battery had the occasional "Service Battery", but after Mavericks it's been constant (and battery life dropped significantly, including not starting up at all from ~= 40% when the laptop was subjected to a few hours of early Finnish winter in a car.  SMC reset helped once in ML, with Mavericks it did nothing...

Then I noticed there's also a PRAM (or NVRAM really on Intel-based macs). Shouldn't have anything to do with the battery, but... After resetting that "Service Battery" is gone and I'm still having 50% battery after 3h of (light) use! Needs way more testing, sure, but looking good so far!

Will take mine to the local service shop where they'll apparently run apple diag software on it for free (before charging an arm and an leg for a replacement battery, which I hopefully might not need, yet...)