Asus Eee PC T91 Swivel-Screen Tablet Netbook

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Power Consumption and Battery Life

Asus' Eee PC T91 arrives with a non-removable, rechargeable battery that's rated for five hours of computing. What's strange, however, is just how accurate the rating proved to be. Just last month, we found that Asus' own Eee PC 1005HA fell well short of the 10.5 hours of claimed computing time. It's difficult to imagine that Asus changed its exaggerating ways in the course of four weeks, so we're sort of baffled at why the T91 lives up to its battery life rating, while the 1000HE, 1005HA and 1008HA all fell noticeably short.

Battery Info & Performance
Testing with BatteryEater Pro

Just so you know, you can't swap this battery out. That's a deal-breaker for some, considering that you can't just pop an extra battery in when the first one runs dry. If you run the battery dry, you'll be tethered to an AC outlet until it recharges, which is a real bummer for some true road warriors.

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Our Classic Test here does a great job of putting the netbook through a "real-world" work environment to see just how long your battery will last under pressure. The Eee PC T91 mustered 4 hours and 48 minutes, which is darn close to the 5 hours of claimed time. That's with Wi-Fi and Bluetooth on and screen brightness about half way. We've got no doubt that the SSD helps here, as do the lower-end CPU and graphics, as they're well known for being power-saving devices. If you're less demanding, you can absolutely get more than the rated five hours. In fact, we managed to get 6 hours with some light usage.

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