I finally had a chance to do a full charge of my electric razor and I have the electricity use figures. To completely charge the drained battery (the razor had stopped) took 0.01 kWh total. The razor seemed to be consistently pulling 4 watts (note: I mistakenly said .4 watts on my previous post, an error I’ve now corrected). To put this in perspective, charging the razor completely takes about as much energy as it takes to run a standard 60 watt light bulb for 10 minutes.
If anyone in San Diego wants to feel what 60 watts is like first hand, check out the global warming exhibit at Birch Aquarium in La Jolla. They have a little display set up where you can turn a hand crank to power both a 60 watt incandescent and a ~13 watt (if memory serves) compact fluorescent. I’m not sure what the efficiency of the hand crank is, but the task takes more effort than one might assume.
I should also mention, now that I’ve become more accustomed to the electric shaving process, that it takes a good deal less time to shave with an electric razor as compared to a safety razor. I would imagine that same relationship would hold between electric and straight razors, and perhaps be even more pronounced. I guess the time savings don’t have a direct environmental impact, but they do free one up to spend more time saving the whales.