1.It is used to repair and assemble 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 Dyson V10 Vacuum Cleaner.4.Replacement 25.2V Lithium-Ion Battery PCB Circuit Board For Dyson V10.size: 11 x 4.5 x 2cmMaterial: PCB+Metalcolour: greenPackage Contents:2 x Battery Protection BoardOnly the above package content, other products are not included.Note: Light shooting 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.