Model: N5110 (Inspiron 15R)
Battery: 6 cell
Graphics: NVidia GeForce 525M 1GB (No driver for Ubuntu), Working on Intel Graphics 1GB
OS: Ubuntu 12.04 (Precise) 64 bit
Dell laptop battery backup 1.30 hours only with Ubuntu 12.04. How can the battery backup be increased?
I had the same problem and the reason turned out to be that the graphic card was always ON.
What you need to do is to install
sudo add-apt-repository ppa:bumblebee/stable sudo apt-get update sudo apt-get install bumblebee bumblebee-nvidia linux-headers-generic
For more information, you can visit the Ubuntu BumbleBee Wiki Page.
Try the jupiter applet, play around with some settings and see if it helps
Press Ctrl-Alt-t, terminal will pop up; type
enter password (you won't see it as you type, that's normal), confirm adding the repo, then:
click the "lightning bolt" that appears on the panel, play around with some settings, ie set Performance to "Power on demand" or "Power saving". Reboot.