You want to talk about batteries? Let's talk about batteries.

While it doesn't get the "all day performance" of the 13" Air, the 7.6 V, 5100 mAh battery provides up to 9 hours of life in the 11" MacBook Air.

At 8.08 oz and 38.75 watt-hours, the new battery trumps last year's puny 7.90 oz module rated at 35 watt-hours and providing a measly 5 hours of battery life.

For comparison's sake, the 12-hour unit in the 13" model tips the scales at 10.35 oz.