I do not know much about them. I do know that they worked well for the job that he did. The finishing nailer does not have a charger. They have not been used in over a year. The item "Paslode 900420 Cordless Framing Nailer Nail Gun and a 900400 Finish Nail Gun" is in sale since Friday, December 7, 2018.This item is in the category "Home & Garden\Tools & Workshop Equipment\Air Tools\Nailers & Staple Guns". The seller is "tarastuff2839" and is located in Hamlin, New York. This item can be shipped to United States.