General description 10X 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 Package Contents: 10 x Protection Board Measurement allowed error: +/- 1-3 cm 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.