I have the same problem as well, here the EtreCheck results:
Problem description:
The battery only last half the time it lasted when i had mavericks on my system.
EtreCheck version: 2.0.8 (95)
Report generated 31 oktober 2014 00:15:03 CET
Hardware Information: ℹ️
MacBook Pro (13-inch, Early 2011) (Verified)
MacBook Pro - model: MacBookPro8,1
1 2.3 GHz Intel Core i5 CPU: 2-core
8 GB RAM Upgradeable
BANK 0/DIMM0
4 GB DDR3 1333 MHz ok
BANK 1/DIMM0
4 GB DDR3 1333 MHz ok
Bluetooth: Old - Handoff/Airdrop2 not supported
Wireless: en1: 802.11 a/b/g/n
Video Information: ℹ️
Intel HD Graphics 3000 - VRAM: 512 MB
Color LCD 1280 x 800
System Software: ℹ️
OS X 10.10 (14A389) - Uptime: 2 days 2:13:21
Disk Information: ℹ️
Crucial_CT512MX100SSD1 disk0 : (512,11 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted> : 210 MB
disk0s2 (disk0s2) <not mounted> : 511.77 GB
Boot OS X (disk0s3) <not mounted> : 134 MB
Crucial_CT512MX100SSD1 disk1 : (512,11 GB)
S.M.A.R.T. Status: Verified
EFI (disk1s1) <not mounted> : 210 MB
disk1s2 (disk1s2) <not mounted> : 511.77 GB
Boot OS X (disk1s3) <not mounted> : 134 MB
USB Information: ℹ️
Apple Inc. FaceTime HD Camera (Built-in)
Apple Inc. Apple Internal Keyboard / Trackpad
Apple Inc. BRCM2070 Hub
Apple Inc. Bluetooth USB Host Controller
Apple Computer, Inc. IR Receiver
Thunderbolt Information: ℹ️
Apple Inc. thunderbolt_bus
Gatekeeper: ℹ️
Anywhere
Kernel Extensions: ℹ️
/Applications/Tunnelblick.app
[not loaded] net.tunnelblick.tap (1.0) Support
[not loaded] net.tunnelblick.tun (1.0) Support
/Library/Application Support/VirtualBox
[loaded] org.virtualbox.kext.VBoxDrv (4.3.16) Support
[loaded] org.virtualbox.kext.VBoxNetAdp (4.3.16) Support
[loaded] org.virtualbox.kext.VBoxNetFlt (4.3.16) Support
[loaded] org.virtualbox.kext.VBoxUSB (4.3.16) Support
Problem System Launch Agents: ℹ️
[failed] com.apple.CallHistoryPluginHelper.plist
[failed] com.apple.CallHistorySyncHelper.plist
[failed] com.apple.coreservices.appleid.authentication.plist
[failed] com.apple.printtool.agent.plist
[failed] com.apple.printuitool.agent.plist
[failed] com.apple.rcd.plist
[failed] com.apple.spindump_agent.plist
[failed] com.apple.telephonyutilities.callservicesd.plist
[failed] com.apple.warmd_agent.plist
[failed] com.apple.xpc.loginitemregisterd.plist
Problem System Launch Daemons: ℹ️
[failed] com.apple.AirPlayXPCHelper.plist
[failed] com.apple.AssetCacheLocatorService.plist
[failed] com.apple.ctkd.plist
[failed] com.apple.ifdreader.plist
[failed] com.apple.nehelper.plist
[failed] com.apple.periodic-daily.plist
[failed] com.apple.periodic-weekly.plist
[failed] com.apple.softwareupdate_download_service.plist
[failed] com.apple.tccd.system.plist
[failed] com.apple.wdhelper.plist
[failed] com.apple.xpc.smd.plist
Launch Agents: ℹ️
[running] com.bjango.istatmenusagent.plist Support
[running] com.bjango.istatmenusnotifications.plist Support
[loaded] com.oracle.java.Java-Updater.plist Support
Launch Daemons: ℹ️
[loaded] com.adobe.fpsaud.plist Support
[running] com.bjango.istatmenusdaemon.plist Support
[loaded] com.ea.origin.ESHelper.plist Support
[loaded] com.microsoft.office.licensing.helper.plist Support
[loaded] com.oracle.java.Helper-Tool.plist Support
[loaded] org.cindori.TEAuth.plist Support
[not loaded] org.virtualbox.startup.plist Support
User Launch Agents: ℹ️
[loaded] com.google.keystone.agent.plist Support
[running] com.spotify.webhelper.plist Support
[loaded] com.valvesoftware.steamclean.plist Support
[loaded] net.tunnelblick.tunnelblick.LaunchAtLogin.plist Support
[not loaded] org.virtualbox.vboxwebsrv.plist Support
User Login Items: ℹ️
Servicetool Selfcare Programma (/Applications/KPN/KPN Servicetool.app/Contents/Applications/KPN Servicetool Selfcare.app)
iTunesHelper Programma (/Applications/iTunes.app/Contents/MacOS/iTunesHelper.app)
Steam Programma (/Applications/Steam.app)
TrimCheck Programma (/Applications/Trim Enabler.app/Contents/Helpers/TrimCheck.app)
Spotify Programma (/Applications/Spotify.app)
Origin Programma (/Applications/Origin.app)
Internet Plug-ins: ℹ️
FlashPlayer-10.6: Version: 15.0.0.189 - SDK 10.6 Support
QuickTime Plugin: Version: 7.7.3
Flash Player: Version: 15.0.0.189 - SDK 10.6 Support
Default Browser: Version: 600 - SDK 10.10
SharePointBrowserPlugin: Version: 14.4.4 - SDK 10.6 Support
Silverlight: Version: 5.1.30514.0 - SDK 10.6 Support
JavaAppletPlugin: Version: Java 8 Update 20 Check version
3rd Party Preference Panes: ℹ️
Flash Player Support
Java Support
Time Machine: ℹ️
Time Machine not configured!
Top Processes by CPU: ℹ️
24% mds
12% WindowServer
0% ocspd
0% fontd
0% ps
Top Processes by Memory: ℹ️
163 MB Safari
129 MB WindowServer
103 MB Finder
94 MB mds_stores
69 MB Telegram
Virtual Memory Information: ℹ️
2.73 GB Free RAM
1.74 GB Active RAM
917 MB Inactive RAM
1.80 GB Wired RAM
20.19 GB Page-ins
2.38 GB Page-outs