The flip cover is excellent, holds other pens and has space for blank sheets of paper, SD cards and other credit card size bits and pieces.
It will charge from any usb charger, so if you have one already use it. It would need to give out at least 500mA, but that should be pretty standard.
There were some photos showing teh differnet covers in an earlier thread, you could see if they show up in a search.
regards
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