Is there a way to leave my buds 3 pro earbuds powered off  -- *without* having the case with me -- until I am ready to use them?

I am going to be running a half-marathon soon and plan to run with my buds in for the music.  Up until now I just put them in when I walk out my front door.  But the day of the race, there's going to be a significant amount of time from when I can check my gear bag to when I actually start to run my race (it will be at least an hour or so) -- I don't want my buds to be powered on that entire time as I'm worried they'll run out of battery during my race.  And I don't want to have to carry my case with me while i'm running.

Is there a way to leave the buds powered off until i'm ready to start?