オリジナル投稿者： Dan ,
Sounds like you have something (process) running in background which is chewing on you battery. First look under your account to see what you have setup as a start up item. Next make sure you have shutdown all of your open apps. Also make sure if you have any add on's running on your menu bar shut them down as well. So at this point you should only have the core OS processes running. Making sure your battery is fully charged open up Activity Monitor and review these Apple T/N's [https://support.apple.com/en-us/HT201464|Use Activity Monitor on your Mac] and this one [https://support.apple.com/en-us/HT203184|Apps can affect Mac performance, battery runtime, temperature, and fan activity]. See what is running that shouldn't. Do be careful! You don't want to kill off needed services. The trick is to see what folder the file sits in if its one of Apple's it will have it in its path name.