Low battery life

I'll try the simple clock and see what happens.

LCARS does display a lot of different info - I haven't tried it for any length of time but it wouldn't be a huge surprise to me if it drained the battery quick.

• Most apps don't affect battery life as they're usually not running unless explicitly loaded
  
• Widgets do affect battery life
  
• Clock faces are running all the time, so do have a big effect on battery life
  
• If you turn on the HRM in Health settings, use a really large LCD timeout, or change other settings you can hurt battery life too
  
  

Honestly, best bet is to do install default apps and leave the setting alone and see if you get a decent battery life - then work from there installing things and changing settings and see if something in particular is making it worse.