General description 6X Li-Ion Battery Charging PCB Protection Circuit Board designed specifically for 21.6V V6 and V7 cordless vacuum cleaners. This protection circuit board ensures safe and efficient charging of your vacuum cleaner's battery. Technical specifications Material: PCB Color: Green Measurement allowed error: +/- 1-3 cm Package Contents 6 x Protection Board Other information Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product.