Lousy iPhone Strava App...

It sucked the life out of my iPhone battery and ended up killing my iPhone (with it my Strava tracking) mid-ride.  So I went through the last 1/3 of the Giro di San Diego with no Strava tracking and no ability to "call for help" if something would have happened.  Bad Strava!  How do I make you not suck so much energy?