Just purchased a replacement battery for my 12" G4 1ghz. Looking for a quick opinion from the forum. To keep my battery in tip-top condition, should I: 1) Only plug in the charger when the battery has been drained to a low level. 2) Plug in the charger and "top off" the battery even if it's not run down? Also - Is there any harm in leaving the battery plugged into the charger for long periods of time. PLEASE don't direct me to Apple's knowledge base. I've read everything I can find on this and I'm just looking for your personal experiences, which always seem to be more relevant than the experts.