In an attempt to quantitatively measure the W510's battery life in a controlled benchmark environment, we ran both Battery Eater Pro and our own Hot Hardware web browsing test where we set up a webpage with a mix of graphics, Flash media and text. The page automatically refreshes every three minutes, we loop the page and disable sleep and hibernate modes. Battery life is measured down to the minute the tablet shuts down. The Wi-Fi radio is enabled in this test to simulate battery life in real-world web browsing over a wireless connection. The stock browser was used. For both tests, we set the W510's display to 50% brightness, which is still plenty bright and easy on the eyes.
When docked in the keyboard dock, the W510 outlasted all other tablets by a large margin in our web browsing test. Even when tested without the dock, the W510 still outlasted all other systems in our comparison.
In the Battery Eater tests, you see much of the same: the W510 with the keyboard dock and extra battery outlasted all other systems by a large margin. When comparing just the tablet to other systems in the Battery Eater test, the W510 still outlasted most systems; only the Samsung ATIV 500T outlasted the W510.