I have a number of Ryobi power tools and the batteries have had a good life (so far). They don't get industrial use, but regular DIY and yard maintenance work.
My neighbour recently bought a Ryobi battery powered push lawn mower and I helped her neighbour mow his lawn. That mower was a pleasure to use. Very light pushing especially up a steep hill (the wrong way to mow on a hill, but no other way to mow that section). It has 2 batteries and runs just fine and mows her lawn (or the neighbours) on only one. The batteries are bigger than what I use for my power tools but might still be interchangeable.
My neighbour recently bought a Ryobi battery powered push lawn mower and I helped her neighbour mow his lawn. That mower was a pleasure to use. Very light pushing especially up a steep hill (the wrong way to mow on a hill, but no other way to mow that section). It has 2 batteries and runs just fine and mows her lawn (or the neighbours) on only one. The batteries are bigger than what I use for my power tools but might still be interchangeable.