2XFor Dewalt DCB204-2 20V 20 Volt Battery Max XR 4.0Ah Lithium Ion DCB205 DCB200
My brother had bought the 6.0 batteries and had used them a lot. I was very pleased with them. Then I bought some of the 4.0s and I couldn't be happier. For the price of the batteries I wasn't sure. But I was wrong. They were a great buy and I will buy more.