Not only should battery performance improve with the new update, but other issues like the Surface Book shutting down all of a sudden and Surface Pro 4 draining battery life even when on sleep mode. Back in December, a number of users of the Surface Pro 4 across the world complained that Surface Pro 4 batteries lost their juice even when their tablets were kept in sleep mode, thus ruining their plans of working outdoors for long hours.
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According to Microsoft, the Surface Pro 4 battery can support up to 9 hours of video playback and several more hours of browsing or working on Microsoft Office files. However, a user claimed that the battery charge in his Surface Pro 4 went down from 100% to 72% in just three hours when the tablet was kept in sleep mode!
"I can't use it for work if it's going to die on me in my bag or on my desk throughout the day with minimal use... I still have about 15 more days to decide if I'm going to keep it," he added. Microsoft did admit that such an issue existed and promised to deliver a patch soon. It took them six months to come up with a fix.
"The 'standby' battery life is an issue we are working on and have been working on. We can put the processor into a deeper sleep state than it is currently set to. We couldn't do it at RTM for a variety of reasons, power management is a very hard computer science problem to solve especially with new silicon. Currently it is not in the deepest "sleep" that it can be so there are wake events that would not otherwise wake it. We will have an update for this issue sometime soon in the New Year," said a Microsoft executive back in December.
In January, Microsoft started voluntarily recalling power cords of older Surface Pro tablets citing over heating issues. The recall included power cords of Surface Pro, Surface Pro 2 and Surface Pro 3 tablets.
Microsoft’s Surface Pro 4 feeds on battery in sleep mode; no patch until New Year
The new firmware update, bringing in improvements to the battery and power management, comes at a time when Microsoft is gearing up to launch the Surface Pro 5 either next month, or as some sources predict, by January of next year. If Surface Pro 5 launches next month, it will feature Intel's existing Skylake processor but if it launches next year, it may feature Kaby Lake, a more powerful successor of the Skylake chip.
It is also being rumoured that Surface Pro 5 may launch with a rechargeable Surface Pen and dock. The rumour lends itself to a patent filed by Microsoft in January which detailed out how the AAA battery in the Surface Pen can be replaced with a rechargeable one. Also rumoured are the facts that a USB Type-C port pay replace the USB 3.0 port while other ports like a MicroSD one, a DisplayPort and an audio jack may remain unchanged.