What's the best battery saving app for OSX?

It's a small menu bar app that let's you save battery when you're running low by dimming the screen, monitoring expensive apps, etc. It's free.

Coconut Battery ( Updated Jan 2017 ) will reveal the following to you about your battery:

 Manufacturer: 
Manufacture Date:
 Age:
 Loadcycles: 
Serial #: Battery Status:
Temperature: Battery failure:
Power Adapter: 

It constantly displays the following battery stats:
 Current Charge (mAh) 
Full Charge Capacity (mAh) w/ % bar Design Capacity (mAh) w/ % bar Cycle count

 In addition to this you can connect an iOS device and further study battery stats of the iOS device. http://www.coconut-flavour.com/c...

Hasn't been updated in a few months, but used to use it to extend battery when I was traveling. Lately, I've just been setting the power saving settings aggressively and then using Amphetamine when I need to keep it from sleeping.