1.It is used to repair and assemble batteries pack,2.onlyfor people who are familiar with battery performance and have practical experience in battery assembly.3.Replacement BAT610 18V Lithium-Ion Battery PCB Circuit Board For Boschs BAT609 BAT609G BAT618 BAT618G Li-ion Battery Replace Part Number BAT609 BAT609G BAT618 BAT618Gcolour: greenMaterial: PCBsize: 4.3x7.5x0.7cmPackageContents:10 x Protection BoardNote: This product is Charging Protection Circuit Board without battery core.Only the above package content, other products are not included.Note:Light and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.