Fingers are pointing at Windows 8.1 as tests show that both the Surface Pro 2 and Surface 2 tablets trail behind OS X, iOS and Android devices when it comes to battery life.

Yes—but the gains vary greatly depending on the way you use the tablet. PCWorld Lab Manager Tony Leung has been battering the Surface Pro 2 with a barrage of battery tests ever since we first ...

Microsoft's subtly updated Windows 8.1 tablet feels more like Surface Pro 1.5 -- improved battery life and better accessories make it a worthwhile (albeit pricey) laptop replacement, but it's ...

Called the Surface Pro 2, Microsoft’s new tablet will reportedly be powered by Intel’s newest Haswell-based Core i5 chip, which should improve battery life by a few hours.

The Microsoft Surface Pro 2 already comes with an improved battery over the original tablet. According to Microsoft, the device will give you up to 75 percent more battery power than the first ...

Microsoft’s Surface 2 tablet, running on Windows RT 8.1, has not received similar battery improvements in its firmware update, meaning the Pro 2 outpaces the ARM-based model on battery life. See ...

The first-generation Pro lasted for about four or five hours on a charge, so a 75 percent improvement would put Surface Pro 2 battery life in the seven- to eight-hour range.

“Microsoft’s Surface 2 tablet, running on Windows RT 8.1, has not received similar battery improvements in its firmware update, meaning the Pro 2 outpaces the ARM-based model on battery life ...

Surface Pro 2: Better Battery Life The more expensive $899 Surface Pro 2, however, has some more subtle changes. "We really knew there were a few elements we had to get right and better," Panay said.

The Microsoft Surface Pro 2 is significantly more battery-efficient than it was when it first launched on Oct. 22, thanks to a firmware update pushed by Microsoft shortly thereafter.

Firmware update gives 25% boost. Microsoft (NASDAQ:MSFT) has made the Surface Pro 2 better. With a big increase in battery life, thanks to a bug fix, it’s made its ‘full-fat’ Windows 8.1 ...

What you need to know. Surface Pro 4 and Surface Book 2 users have reported battery drain issues. Microsoft has responded to the issue and is "currently investigating the issue." ...