Over the past couple of months, many Surface Pro 3 users have complained of rapid battery drain. As we reported at the time, Microsoft’s Panos Panay said that the SP3’s battery should hold up to weekday charges over the course of four-and-a-half years, at which point the battery would be expected to have about 80% of its capacity remaining.

Source: Hot Hardware – Microsoft Test Surface Pro 3 Software Fix For Rapid Battery Drain