There are tons of USB devices out now ranging from the seasonal christmas tree, rool up piano and more. We now have the rechargeable USB shaver which is charged via your laptop. This is very useful for the business traveler who forgets their regular shaver or a compatible power supply. There isnt too much to the USB shaver. It has an LED which lights up when it is being charged and the USB connector which can fold in to the case to compact it even more.
It weighs just 74 grams and power consumption is low and it shouldnt kill your battery in your laptop.
Via: Coolest-Gadgets
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