A Few Tips How to Conserve Battery Power When It’s Almost Gone

Think About Your Shot First
Turn Off Auto Focus
Turn Off The Review Feature
Turn off Image Stabilization
Power Off Your Camera When Not In Use

The Most Important Tip: Relax!

Leaving behind your camera's battery charger, intentionally or
accidentally, can really change how you approach photography while on
location.  Once you get over the initial 'freak out' when it's not
found, remember there are steps you can take to continue using your
camera.  And never forget the most important tip: Relax!!

NOTE: When your battery does finally die with no chance for charging,
be sure to remove the flash card and keep it with other valuables.
Chances are you'll leave your camera behind or unattended far more
than if it was working and it may fall into the wrong hands. Or get
lost in the shuffle of checked baggage.  Keeping your flash card with
you ensures your photos make it back even if the camera goes missing.