From PC World: As it stands, Microsoft’s Surface Pen stylus will last about a year off of its non-rechargeable battery, according to the company. While that’s pretty good, it still means you’ll have to buy a new battery at some point. It isn’t a big deal, but it’s an annoyance nonetheless.
Microsoft may be hard at work to address that annoyance, however: According to Patently Mobile, Microsoft filed a patent for a rechargeable stylus and charging cradle.
The stylus as shown in patent drawings appears to have what you’d expect from a Surface Pen: It has a drawing tip on one end, an eraser on the other, and a power button on the side. Inside, a rechargeable battery would power the pen. An indicator light that would presumably give you an idea of your battery’s charge lives on the side.
Metal contacts on the stylus would facilitate charging, and the pen would magnetically attach to a charging cradle, Patently Mobile’s says.
According to Patently Mobile, “Microsoft filed their patent application back in June 2014,” though the US Patent and Trademark Office only recently published the application.
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