Ryobi ONE+ Nickel Cadmium 18-Volt Batteries (2-Pack) for $54.97 after coupon code APRILHD. Shipping is $6.64 for a total of $61.61 shipped, or free on orders over $249. If needed, use this Filler Tool to qualify for free shipping. Here is a screenshot for your reference. It is compatible with all Ryobi 18-Volt One+ tools and chargers.