If you need to plane a lot of plank you're doing yourself a favour by using an electric planer. No need to look for a power outlet, since it runs on batteries. Just get at it!
From Data Powertools
Bosch GHO12V-20 12v Brushless Planer ( Body Only )
Powertool World
Bosch GHO 12V-20 Brushless Cordless Compact Planer 56mm Body Only
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