ive noticed after going from a white plastic 2.2Ghz macbook to a 2.0Ghz aluminium macbook that the aluminium one takes a lot longer to finish the charge. the 17"er is advertising a charging system that varys the current in relation to the battery condition so i was wondering if all aluminium models have adopted this to prolong the battery condition. when charging the white one used to leap right up to 100% in a matter of two hours from dead flat, the aluminium one leaps up to 50% then from 50% to about 85% its a bit slower then from 90% to 100% its quite slow, like 45mins to do the last 10% type of slow. im at 94% and charging at a rate of 390mAh. do you think that apple have adpoted a more intelligent charging system into the aluminium 13" and 15" macbooks? there could possibly be a different system in the 17" which further improves the battery lifetime, i would have thought they would advertise it if the 13" and 15" macbooks could do a 1000 cycle lifetime.