Last I checked Wacom has Wacom AES 1.0 and 2.0 which use powered pens. EMR doesn't use battery powered pens and is powered by the digitizer but it's not Wacom's only product.
And yes, I am somwhere warm and also with lots of tech, my desk has various devices with which I work and which it would not behoove me to scatter to the four winds in hopes of better battery life.
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