MAC has 30 Minute Battery life after Norton Install

The Day I installed Norton Mac, I noticed that my battery only lasted about 30-60 Minutes if unplugged. How can I get my battery life back to the 3 Hours prior to install?

 

Help

 

Mike

The Day I installed Norton Mac, I noticed that my battery only lasted about 30-60 Minutes if unplugged. How can I get my battery life back to the 3 Hours prior to install?

 

Help

 

Mike