They rate these things like planes are rated: "1900 mile range, 400mph speed" really means "1900 mile range" OR "400 mph speed" because the range is only at bes

They rate these things like planes are rated: "1900 mile range, 400mph speed" really means "1900 mile range" OR "400 mph speed" because the range is only at best economy speed, and the top speed will never produce range. Same thing here: stated perf OR stated low power. Power use at max perf: 157W