Rough estimates put battery lifespan at between 6 and 12.5 hours, depending on the model and OS.
At face value the Surface tablet seems to compete with the iPad, but the reality is that it could change both the tablet and PC markets.
How Microsoft's Surface tablet matches up against the latest iPad, by the numbers.
Microsoft's Surface tablet looked good at its introduction, but questions about pricing, arrival and connectivity remain unanswered.
Microsoft's new Surface tablets could bite into sales of tablets from Windows 8 and Windows RT licensees.
The software leader has produced its own hardware before, but never competing with the platforms that run Windows.
The company unveiled tablets running Windows 8 and Windows RT at a press conference in Los Angeles
Forrester analyst worries that the dual-OS strategy will confuse buyers
Price may be major stumbling block to real competition, but Windows tablet could be enterprise winner, say experts.
Microsoft has invited news media to L.A. event Monday and there are many more rumours doing the rounds.
Impressive as some features may be, Microsoft's tablet won't threaten the iPad.