It can fill 5 pieces of 18650 li-ion batteries with LED battery status indicator. But this is only a shell, there is no battery inside. Suit for Zhipu Hongsong Jingmi no Original for 18V Lithium Battery. Innovative shell design: There is a red protective layer at the bottom, which can better protect the battery and prevent damage! This product is component without battery core. This is only a shell, there is no battery inside. 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. PCB Specification: 1.Built-in IC detects cell voltage current.And remember number of uses! 2.Detection and protection battery: Overheat protection,overvoltage protection,undervoltage protection,overcurrent protection,overcharge protection. 3.PCB design may change due to changes in the supply chain and processing technology. Please be kindly noted: If you have any objection to the following two items,please