Ryobi says to go through the HD Tool Rental department. Our local HD doesn't have one now, have to drive to Chattanooga for warranty work. Found a mom-and-pop small engine shop that is a Ryobi service center. Had them take care of the battery; took about 6 days.
As far as sawhorses go, these days, Im all about the Toughbuilts. I found this model to be perfect for me: LINK
I use three of those and a couple 8FT 2x4s and a sheet of 4x8 2" rigid foam as my track saw table.
I once almost got tripped up by a farmer that stored diesel fuel in a red can because it's what he had on hand.... when i heckled him about it i believe the response was something "Well you appear to know the difference in smell so why does it matter?"