1.It is used to repair and batteries pack, 2.only for people who are familiar with battery performance and have practical experience in battery assembly. 3.Standard chip board PCB for replace for tools battery 4.Replacement 18V Lithium- Battery PCB Circuit Board For R840083 R840085 R840086 R840087 and more. Note: This product is Charging Protection Circuit Board without battery core. Colour:green+silver+black Material:PCB+Plastic+Metal Package Contents: 1 x - Battery Protection Board Only the above package content, other are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.