Posted by: kurtsh | January 24, 2015

INFO: Surface Pro 3 stylus “watch batteries”

imageThe Surface Pro 3 actually has 3 batteries in it, in case you forgot. 

It has 1 AAAA Alkaline Battery that powers the pen itself which most people know about, but it also has 2 watch batteries that power the “Purple Click” button that initiates OneNote.

These batteries are #319 Button Cell Silver Oxide Watch Batteries.  You can purchase backup batteries here:


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