Maximize battery life while recording video There are times where I need to record a lot of continuous video. I've found battery life to be insufficient for this. Is there anything I can do to squeeze out every bit of battery efficiency?

The biggest offender is probably the screen. I don't need it to be on, as the phone is usually propped up against something while I do the stuff I'm trying to record (weight lifting in my basement; recording myself to check for correct technique). Codec choice also comes to mind as potentially CPU intensive and thus battery draining.

Any ideas?
Secret Eye can help the drain from screen. It allows to record even after the screen is switched off. There are lots of similar apps. Find the best one.

Inorder to save more battery, 


You can root the phone and use an cpu governor to run the processor at lower clock cycle. 
Freeze unwanted apps.
Turn off radio