1.It is used for repairing and assembling batteries 2. Only for people who are familiar with battery performance and have practical experience in battery assembly. 3. Standard chip board PCB for replacing tool battery 4. For 20V Li-Ion battery DCB201DCB203 Note: Product is a charging protection board without battery core. Color: Black + Green Material: PCB + Metal Package Contents: 4 x Protection Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.