If your in the US you have better battery options then me..
I'd get those, 2 X 6.0ah for just a little more then the 4.0ah
https://www.amazon.com/LBXR20-Battery-Replacement-Decker-Lithium-ion/dp/B08H21QDK9/ref=sr_1_7?crid=137IWHWWNZOUR&keywords=worx+20v+battery&qid=1649255761&sprefix=Worx+2%2Caps%2C99&sr=8-7