Originally Posted by Sgt_Strider
I'm currently using my dad's Asus Z71V for school. Hopefully I'll get my own laptop within the coming months, but in the meantime I have his to use. The problem is that the battery life on his laptop is really bad. The system consist of 1gb of ram, Geforce 6600, PM 1.73ghz, 80 GB hard drive, and DVD drive can only last for about 2 hours. I just surf the net, chat, and use MS word. I know one way to extend battery life is to get a bigger battery or use a battery in place of the optical drive. I'm avoiding that route because I don't intend to use my dad's laptop for long. Second, I heard I can underclock the notebook, but I'm not sure how beneficial that would be. Does anyone here have any numbers for me to play with? Like what clockspeed and at what voltage and what your battery life is like? I don't have time to experiment around and would appreciate if someone can help me out on this. Thanks!
Ways to help extend battery life
1: in the Nvidia control panel, under "Powermizer", change the setting under battery to "maximum power savings"
2: undervolt with either Notebook Hardware Control (found here
) or RMClock (found here
) Since each individual processor is different (even among those with the same clock speed), your particular voltages can only be determined by you. But as an example, I have a 1.86 Ghz processor, and my voltages are as follows:
undervolting has added 15 - 30 minutes on to battery life for me (from 3.5 hours to between 3.75 and 4 hours)
p.s.: there is a battery meter in NHC, but I've found it rather unreliable, so believe the one in Windows
3: Once you've got either NHC or RMClock running, make sure that your processor is speed-stepping (going from 800 Mhz to 1.73 Ghz as needed) while on battery power. If not, Speed Step may need to be enabled in BIOS, if I recall correctly
4: Look at the programs running in Task Manager, and determine if some of them can be shut down. Less programs running = more battery life.