Features:brand new and high qualityIt is used to repair and assemble batteries pack,only for people who are familiar with battery performance and have practical experience in battery assembly.This can be filled with 15 18650 power lithium-ion batteries, but this is just a for case, no batteries.Before soldering the PCB, make sure that the voltage of each battery is the same.If the old batteries are repaired, please test the voltage across each battery. If the voltage is different, charge each battery to the same voltage value.for DCB200. Specifications:Material:ABS,PCBSize:Approx.110x75x70mm/4.33x2.95x2.76inNet 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 Protection Board