ok super linux noob here, but i found out how to change and save pmconfig file.

using vim editor:
1. open xterminal
2. sudo gainroot
3. cd /etc
4. vi pmconfig
5. move to the "0" on the line "sr_vdd1_autocomp 0" and press r, and enter "1". Then repeat for "sr_vdd2_autocomp 0".
6. to save " :w "
7. to exit " :q!:

hopefully that works for you.

*** note: i just changed this, so i do not know if this will increase battery life.

*** Update*** I only got 8 hours usage.