I can sort of see how that's justified when advertising to people who don't really understand electrical units. The battery capacity is listed in kilowatt hours. If you don't really understand what a kilowatt is but you know the battery has a capacity of 60 kilowatt hours, and the charger charges at 10 kilowatt hours per hour, then it'll charge in about 6 hours.

Still, it does make me cringe a little.