I am having the same issue. Mid 2010 13 MBP. Prior to Mavericks I was getting at least 6 hours of use and not I barely get 3. Service Required. I have submitted feedback to Apple as I am not convinced they actaully monitor these forums very closely. This is quite disappointing. What the **** happend to QA?
Apple you need to get this corrected. I work un-attached a lot and this now makes it nearly impossible.
Charge Remaining (mAh): 2435
Fully Charged: No
Full Charge Capacity (mAh): 4398
Cycle Count: 289
Condition: Service Battery
Battery Installed: Yes
Amperage (mA): -1100
Voltage (mV): 11385
My Anecdote (seems to solve it for me).
2011 MBA, 389 cycle count.
After upgrading to Mavericks I noticed no difference in power usage & battery life.
However I have been using a 3rd party tool for my status bar battery:
Reading about Mavericks upgraded battery monitoring I removed it and reenable the os x batter monitor in the status bar.
Very soon, by I noticed fans whirring and poor battery life (it didnt click at this point).
I check Activity Monitor and notice 2 tasks taking approx 99% cpu each (systemstats & kernal_task).
Reboots ensured - problem still there
Reset SMC - no change
This morning I remembered the battery tool and tried disabling the Mavericks battery monitor (in Energy Saver Prefs) and rebooting.
Problem instantly solved.
Ive gone back to the batty monitor I used previously on ML, and no problems.
(I now have 31% battery showing 1:59 left)
This seems to be the issue for me (I never got the service battry warning - but I did notice the tasks burnign up the CPU)
Hope this helps someone..
Thanks for this suggestion. I tried it, and while the new monitor is cool with many features, it made no positive impact on my battery life. Still dismal. Hopefully Apple addresses this quickly.
They had to address it in Mountain Lion, so I would hazard a guess that the same will happen with Mavericks for those with issues. As it is not widely spread it may just take a little time for them to address it.
My Late 2011 Macbook Pro 17" is also showing the "service battery" message after upgrading to Mavericks. Only 342 cycles on it and the battery appears to be charging just fine, but the current max has dropped from close to 6000 mAh to 4970 mAh. Very disappointing, hopefully Apple gets a fix out soon.