Sun Joe 4V 1Gl. Cordless Chemical Sprayer

This sprayer features a 4-volt lithium-ion battery that is built internally and offers a continuous runtime of up to 4 hours. With its powerful 3-watt motor, it can spray up to 15 gallons per charge. The price drops from $49 to $24.99. Shipping is free for Prime members, or it adds $6.