i got standard nearly 2 hours battery ever since i installed leapord it is definately killing my battery as cool dump always reporting my cpu speed at 1600 mhz and fan is always hot / warm running audible whereas in xp you cannot hear it any ways strange thigng is every time i loaded leapord to just after logging in screen ( as it auto logins ) and i see a mouse cursor the laptop shut down as if plug pulled . but i had battery and ac plugged in as charging as orange led light was on - any ways this happened 3 times in a row constant shut down at that specific point so i presumed when charging , the laptop takes power from battery and battery from AC source if present . so i then tried to boot to xp , buit again , it also shut down straight aft er login promt (again , its on auto login ) . but this occoured 3 times in a row also . so i then pulled out battery . booted up into xp with AC lead only to diagnose the fault and it booted up fine fully on AC lead only. then pluged battery into it . and it showed it has 27 % battery already in it ? it seems apple acpi writing wrong battery levels to the battery ? causing the laptop to think there is 0% battery when there was a sufficient 27 % when i hot plugged into xp?