My Macbook Air 2013 battery life is sub 4 hours. How do I diagnose and resolve the issue?

Question

Hi,
I have a 6 month old Macbook AIr 2013 and I am getting sub 4 hours of battery life against the 12 hrs advertised. I looked into the application monitor and found that Spotlight has been causing my battery to drain
Here is a brief snapshot of System information
Hardware Overview:
  Model Name:          MacBook Air
  Model Identifier:          MacBookAir6,2
  Processor Name:          Intel Core i5
  Processor Speed:          1.3 GHz
  Number of Processors:          1
  Total Number of Cores:          2
  L2 Cache (per Core):          256 KB
  L3 Cache:          3 MB
  Memory:          4 GB
  Boot ROM Version:          MBA61.0099.B07
  SMC Version (system):          2.13f7
Battery Information:
  Model Information:
  Serial Number:          D86349701E7F90KAV
  Manufacturer:          SMP
  Device Name:          bq20z451
  Pack Lot Code:          0
  PCB Lot Code:          0
  Firmware Version:          511
  Hardware Revision:          000a
  Cell Revision:          1200
  Charge Information:
  Charge Remaining (mAh):          6362
  Fully Charged:          No
  Charging:          No
  Full Charge Capacity (mAh):          7023
  Health Information:
  Cycle Count:          16
  Condition:          Normal
  Battery Installed:          Yes
  Amperage (mA):          -1727
  Voltage (mV):          8266
System Power Settings:
  AC Power:
  System Sleep Timer (Minutes):          1
  Disk Sleep Timer (Minutes):          10
  Display Sleep Timer (Minutes):          10
  Wake on AC Change:          No
  Wake on Clamshell Open:          Yes
  Wake on LAN:          Yes
  AutoPowerOff Delay:          14400
  AutoPowerOff Enabled:          1
  DarkWakeBackgroundTasks:          1
  Display Sleep Uses Dim:          Yes
  PrioritizeNetworkReachabilityOverSleep:          0
  Standby Delay:          10800
  Standby Enabled:          1
  Battery Power:
  System Sleep Timer (Minutes):          1
  Disk Sleep Timer (Minutes):          10
  Display Sleep Timer (Minutes):          2
  Wake on AC Change:          No
  Wake on Clamshell Open:          Yes
  AutoPowerOff Delay:          14400
  AutoPowerOff Enabled:          1
  Current Power Source:          Yes
  DarkWakeBackgroundTasks:          0
  Display Sleep Uses Dim:          Yes
  Reduce Brightness:          Yes
  Standby Delay:          10800
  Standby Enabled:          1
Hardware Configuration:
  UPS Installed:          No
AC Charger Information:
  Connected:          No
  Charging:          No
Can somebody please advise me on what exactly is wrong and what I need to do to resolve the issue. Much appreciate the help.
Thanks
Nitin

Answer 1

1. Follow these instructions, or these for OS X 10.9 or later.
2. In the Energy Saver preference pane, uncheck the box marked
Enable Power Nap while on battery power
3. You can also try resetting the SMC.
4. Make sure your system is up to date in Software Update.
5. Make a "Genius" appointment at an Apple Store, or go to another authorized service center.