15 Ways to Extend Laptop Battery Life
 

Laptops tend to lose their charm quickly when you’re constantly looking for the nearest power outlet to charge up. How do you keep your battery going for as long as possible? Here are 15 easy ways to do so.<br><br>
Add more RAM - This will allow you to process more with the memory your laptop has, rather than relying on virtual memory. Virtual memory results in hard drive use, and is much less power efficient. Note that adding more RAM will consume more energy, so this is most applicable if you do need to run memory intensive programs which actually require heavy usage of virtual memory.

http://www.friedbeef.com/2007/07/01/...-battery-life/

Doesn't adding RAM increase power usage? ;)

rams consumes only a little amount of energy compared to a hdd. So lowering the hdd (swap) usage saves a bit of energy.
Quite surprised they didn't even mention undervolting the cpu, this realy save a lot of energy (and heat).

99.99% of laptop users don't fool around with BIOS :)

I'd rather get a second battery if you really can't find a power outlet within miles:D :Like a 16-hour flight in economy class.

find me a laptop which allows vcore control:)

You guys gotta be kidding, undervolting any Intel laptop CPU is easily done from windows and can be fully handled by software. I gained over 30 minutes battery life by undervolting my Pentium M to 0.7v and locking it to 800MHz when not on AC power.

I use notebook hardware control found here http://www.pbus-167.com/ Any Intel CPU uses Speedstep, and that is what this software does. You can change the multiplier and lock it depending on load, ac/battery power, or 24/7 use as long as the system supports Speedstep. Same with voltages. It supports auto-profile selection for many different power state profiles.

AMD users may be out of luck, I'm not entirely sure. But any Intel CPU laptop with Speedstep can be underclocked and undervolted with this software. It does not overclock anything however.

not talking about Speedstep:)

That's pretty much standard on level of power setting in today's laptop. High performance, balanced or power saver; even with AMD. That is what mobile processors are all about :)

Neither was I. :-p Speedstep doesn't undervolt the CPU to 0.700v, it'll default to a much higher voltage even at 800Mhz. The application exploits Speedstep's ability to configure voltage and CPU multipliers on the fly and lets you pick any combination you please for any situation.

I was talking about undervolting like this :D