It's a sprayer, not a pressure washer! I saw some bad reviews and realized those folks were expecting a pressure washer. As a sprayer it works GREAT and way exceeded my expectations. We get green mildew growing on the vinyl siding on the north side of our house. I won't use my pressure washer because it forces water under the siding.
I mix clorox, a squirt of dawn and warm water and just spray it on. A few minutes later I hit it with a soft brush, then rinse with a hose.
We refilled the sprayer severa; times and the battery lasted for the whole job, over 100 linear feet. I was very pleased with this purchase. Lightweight and no stopping to pump every few minutes like my old garden sprayer.