For Dyson V6This product is componentwithout battery core.It is used to repair and assemble batteries pack,only for people who are familiar with battery performanceand have practical experience in battery assembly.Preparation before assembly:First. If a new core is used, please note:1. Please use 18650 power lithium battery andsmall internal resistance, same model and same parameters, Do not use ordinary lithium battery for energy storage2. please test the voltage of a single 18650 battery, and charge the single battery so thatthe voltage of each 18650 battery is the same.The voltage of the 18650 battery cell should be above4.1VSecond. If the old battery is repaired, please test the voltage at both ends of each cell. If the voltage is different, please charge each cell to the same voltage value.Very important:Ensure that the voltage of each 18650 cell is the same before welding PCB.The voltage of the 18650 battery cell should be above4.1VColour: blackMaterial: plasticPackage Contents:1 set x battery case with Protection Circuit 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.