The Eee PC 1000 is powered by a six-cell, 6600mAh Lithium Ion battery that feels like it makes up most of the system's total weight. Because of its position at the rear of the system, the battery makes the Eee a little back-heavy, almost like it's about to tip over if you open the screen too far. Tipping wasn't an issue in normal use on my desk or my lap, though. And speaking of my lap, after a four-hour writing session with the Eee PC perched on my thighs, I can happily report that the bottom of the system barely gets warm.
Asus claims that up to eight hours of run time can be squeezed from the 1000's battery, but that estimate may be a little ambitious. For the first battery life test, I loaded up Bright Hub over Wi-Fi and let the system sit, ensuring that its screen didn't power down. The system was left in its standard on-battery config, which drops the screen brightness by what looks to be about 10%. Just about six hours later, the battery finally gave up. The next test probed video playback, looping an hour's worth of standard-definition DivX video. The Eee handled this task with ease, managing fluid playback for nearly five-and-a-half hours