Description Features: brand new and high quality This product is the core without battery components. It is used to repair and assemble battery packs, It is only suitable for personnel who are familiar with battery performance and have practical experience in battery assembly. It can hold 5pieces 21700 power lithium-ion batteries, but this is just a for case without batteries. Make sure that the voltage of each battery is the same before soldering the PCB. Specifications: Material:ABS Size:Approx.14x7.5x2cm/5.51x2.95x1.18in Net Weight:180g Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Battery for Case