Troy from Ca writes
The Chapin 4 Gallon 20v Wide Mouth Backpack Sprayer 63985 should use the lithium battery suggested by Chapin. The 20V replacement battery is to be used in the Chapin Backpack Sprayer 4 Gal. 20V Lithium Black & Decker Battery (63980) also.
Answer last updated on: 06/05/2018