Hello! I have a Late 2007 MacBook Pro. (a1226) (15.4" 2.4 GHz, 4 GB Memory). I constantly forget to pay attention to the battery level when I am not charging my Mac which leads to it shutting of, dying
. I run OS X Yosemite 10.10. I was hoping there was some third party software I could download for free in which I would get notifications that my battery is at 20% such as the way I do with emails and iMessage and such. I would resort to paying for something from the app store. Thanks 