How do you save battery life?

I bought a Toshiba Satellite L305D-S5900 bout 6 months ago and up until a week ago i didn't realize i was able to take my battery out and use my battery pack witch i have been doing ever since. The question that i have is how to do this the correct way...

ok well i turn off my blackberry to save battery but when i turn it back on im losing like 1 to 2 bars why and how can i fix this?

My iPhone battery seems to run out really quick and it takes forever to charge? Is there any ways to save the battery life so that it doesn't run out so quick.?

mine seems to lose battery quickly and i want to know how to save battery

I had just bought my laptop about 2 months ago, and already my battery life is dying. It had about 2 hours to start with, and I'm down to 1 hour. How do I keep it from dropping even more?

Okay so I turned the back light brightness down to 10, put it on silent, and make it so the clock doesn't display when screen is locked, but the battery still quickly drains. I really don't know why this is or maybe the battery is just bad.

Can anyone advise me on the best settings to use on my i phone 4 to preserve the battery life

This is rumored to be a battery saving technique, but how effective is it?

is ok to leave the laptop connected to the mains while i am close to a power supply? or is it better to let the energy drain then recharge it over night?? whats better for the battery or will nothing really affect it?? thanks