MacBook Air 2014 battery drain OSX 10.9.5

Hi pandu9,

Thanks for visiting Apple Support Communities.

If the battery runtime on your MacBook Air is unexpectedly low, start with these troubleshooting tips:

Built-In Diagnostic Tools

A great place to start when troubleshooting battery issues is the built-in diagnostics that are available on your Mac notebook. Review the following articles for more information on using diagnostics.

• Using Apple Diagnostics
• Using Apple Hardware Test

Note: The additional troubleshooting recommended below assumes you have run the above diagnostic appropriate for your computer and that no issues were found.

My battery runtime is low

1. Identify what the battery life should be for the product you are troubleshooting.

   The Tech Specs site provides Apple's battery life expectations for battery usage. The specifics for wireless web usage and standby time are included in the Tech Specs article for each product.

2. There are several common causes battery drain that you can minimize.

• Take steps to optimize your battery life per the Optimizing Battery Life section earlier in this article.
• A common cause of decreased battery life is a "runaway process." Make sure to check Activity Monitor for any runaway processes, especially after installing software updates or a new operating system. Installing updates is important to ensure optimal performance for all applications.
• If you are still having battery runtime issues after optimizing your computer's performance and checking for runaway processes, test in Safe Mode. Safe Mode limits the active items on the system and allows testing in a more minimal environment. If the battery life is better in Safe Mode, you may need to do further software isolation for the items disabled by Safe Mode to determine what the power draw is while not operating in Safe Mode.

You can find these steps and more information here:

Mac notebooks: All about batteries

All the best,

Jeremy