I own a dell laptop with i5 2.40ghz, 4GB ram, 1GB GPU nvidia Mserie and 1T space; and a mac air. i have notice the speed to wake up from both of my laptop is similar to each other, (3 second). However, My dell, when sleep for a mere 2.5 hour, consume nearly 20% of battery, while my mac air, when close the lid and leave it alone for 7 hour, consume only 5% battery (my friend mac pro also around that). So here My question, how to make my dell consume less battery during sleep mode comparable to mac, or at least to 10% of 5 hour sleep? Thank in advance