Can I use older model magsafe adapters to power my late '10 MacBook Air? I saw someone asked if they could use the power cord from their 15" MPB even though it was rated higher. I don't have an additional adapter, but the ones I'm looking at on amazon are $25, instead of $75. I don't care if its bigger, I just need it to stay plugged in at home. Any advice? I don't know if I can put links to products but I searched "Replacement AC Adapter for Apple MagSafe MacBook Pro Laptops 16.5V, 3.65A 60W" on amazon.com and picked the first one for about $26 bucks... can someone confirm that I can use this, that the magsafe plug is compatible, etc? I really need to get one from amazon, as I have a gc for there and amazon prime shipping for another week, so if you point me else where, please make sure it is on there!