RYOBI 18V HIGH PERFORMANCE Lithium-Ion 2.0 Ah Compact Battery

What you are looking at is RYOBI 18V HIGH PERFORMANCE Lithium-Ion 2.0 Ah Compact Battery, a product. Between versions of the same thing, it is usually the details — capacity, finish, what is included — that separate them. Read the setup notes before first use; most early problems come from a step skipped at the start. Whether it is discounted this week says more about the shop's stock than about the product. Store it dry and out of direct sun, which is the simplest thing you can do for how long it lasts. Add delivery to the cheapest price and you will see whether it is genuinely the best deal.