Proback 12v Diaphragm Pump Battery Powered Backpack Agricultural Sprayer 4 Gallon Five Speed Water Flow Now

5 uses: the switch at the wand went on the fritz. took it apart, oiled, still leaks.replacement 9.99 at tractorsupply.all in all just more lightweight and better manufacturing (?) than that yellow one....but could be seriously improved with: see through level, 18v ryobi compatible lithium battery for 1-2 hr duration and better 18 v pump, better on off switch: on a cable attached to the wand, or a pull string like grandmas nightlight switch!, make a 2 gallon model ... etc