Over 600 cycles and you're still above 60% health?
Dude your battery isn't only not terrible, it's holding out amazingly well!
For future reference, if you want to take a grab of just an app window not a screen shot, press command+shift+4 then the spacebar. The cursor will change to a camera icon and you can then 'photograph' the window you want.
For comparison, my battery is at 364 cycles and 93% health, and this is only because I have taken careful care to keep it maintained. I have a friend who's MacBook Pro has only 272 cycles and it's hovering at 85% health.