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You can buy additional, proprietary cartridges from the Wacom Store for $9.99 for a pack of three. It does not have a separate charging port and, at first glance, appears to be a standard ballpoint pen with a metal clip.
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The included pen is thinner than other styluses I've used. For a student walking to classes all day, or for a professional often on the go, the weight is definitely something to consider. The only real difference between the two is that the Folio has the fold-over cover, and internal slots for business cards and additional paper materials. The larger of the two Bamboo Slate sizes weighs only 1 pound. Once you factor in the weight of a pad of paper, you could easily be carrying around 2.5 pounds of additional weight in your bag. At 13.3 x 10.6 inches and 1.8 pounds, the Bamboo Folio is fairly heavy for its size.
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