HT2404 How long should it take to download combo 10.7.4 OS to my pro book.I bought it a year ago and it has Lion. It has. Been downloading for almost 12 hours and is only about half done. I am also downloading  an iTunes update. I am using wifi.

Trying to download OSX Lion combo plus iTunes  update.taking 11 hours so ar.i am using wifi and am also plugged in to a power source.My Probook is a year old and has Lion.

What happens is that the weaker the battery, the less time it takes it to charge (and run down) because it doesn't take long to reach its lowered maximum capacity.
Although I never worry about my battery and leave my portables plugged in most of the time, that isn't necessarily the best thing for the battery.
Check out Apple's suggestions maintaining battery life and lifespan:
http://www.apple.com/batteries/notebooks.html
Information on battery technology:
http://www.apple.com/batteries/
Calibrating the battery for best performance:
http://support.apple.com/kb/HT1490

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