No pumping is required with this Husqvarna 4-Gallon Battery Backpack Sprayer. This battery powered sprayer offers the same features as Husqvarna's manual 4 gallon backpack sprayer, but it harnesses the power of an 18-volt battery to activate the pump versus manually doing it. Use this cordless electric sprayer for up to four hours or 50 gallons of liquid on a single charge. The impact-resistant battery compartment on the lawn sprayer keeps the battery concealed and away from liquid that may cause damage. Easily accessible filters in the cap, shut off and pump reduce the build-up of large solids which may affect the performance of the battery powered backpack sprayer. Easy to operate, this garden sprayer is controlled with a simple on/off switch — that's it. This Husqvarna backpack sprayer is backed by a 1-year limited manufacturer’s warranty for personal or professional use.