How much AC power do they use?

Curious if anyone has data/opinions on the best ways to keep my energy use down: should I run my ibook g4 on AC power with battery installed or with it removed? should I keep using the old worn-out battery or buy a new one even though I'm usually at home/plugged in? thanks. legolam.

HI,
Keep the battery installed so it stays charged. I finally bit the bullet and purchased a new battery for my iBookG4 and am glad I did as the old one lasted about 15 minutes without A/C power. Also, in System Preferences/Energy Saver, select the preferences that best fit your battery use.
Carolyn

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