Razor
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A razor is a bladed tool primarily used in the removal of body hair through the act of shaving. Kinds of razors include straight razors, safety razors, disposable razors, and electric razors.
A modern razor that uses replaceable blade cartridges
Image: Philips Norelco 9700 Rotary Electric Shaver (30973817280)
Bronze razor
Razor (top) and nail cutter with bone handle (bottom) found in a grave of the Hallstatt culture.
Electric shaver
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An electric shaver is a razor with an electrically powered rotating or oscillating blade. The electric shaver usually does not require the use of shaving cream, soap, or water. The razor may be powered by a small DC motor, which is either powered by batteries or mains electricity. Many modern ones are powered using rechargeable batteries. Alternatively, an electro-mechanical oscillator driven by an AC-energized solenoid may be used. Some very early mechanical shavers had no electric motor and had to be powered by hand, for example by pulling a cord to drive a flywheel.
Image: Oscillating electric razor
The standard AA-size Ni-Cd battery (600 mAh) is soldered in place, deterring user replacement.
Electric shaver (Russia)