It can fill 15 pieces of 18650 Li-ion batteries with LED battery status indicator.This product is componentwithout battery core.It is used to repair and assemble batteries pack, only for people who are familiar with battery performance and have practical experience in battery assembly.100% Brand New,No Battery Cell!PCB Board Specification:1. Built-in IC detects each cell voltage. And remember the number of uses!2. Detection battery status: Overheat , overvoltage , undervoltage , overcurrent , overcharge .3. Stable quality and anti-vibration. It is the best partner of Makita torque wrench and impact drill and angle grinder.4. PCB design may change due to changes in the supply chain and processing technology.Type: Battery Storage BoxDIY Supplies:ELECTRICALModel Number:BL1890Bcolor:BlackMaterial:plasticPackage Contents:1 set x BL1890 Li-ion Battery Case(The color of the PCB protection board is random, and the specified color cannot be selected)Only the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.