General description This 15 Hole 18650 Li-Ion Battery Case Box is designed for assembling and repairing battery packs, specifically compatible with Zhipu Hongsong Jingmi 18V Lithium Batteries. It features an LED battery status indicator and includes a protective layer to safeguard the batteries from damage. Please note that this product is a shell only and does not include batteries. Technical specifications Capacity: Holds 15 pieces of 18650 li-ion batteries Material: Plastic Color: Black & Red (PCB color may vary) Measurement allowed error: +/- 1-3 cm PCB Specifications: Built-in IC detects cell voltage current and tracks usage Protection features: Overheat, overvoltage, undervoltage, overcurrent, and overcharge protection Installation Ensure all 18650 power lithium battery cores are matched with resistance and capacitance for uniform voltage. For old battery repairs, test the voltage of each cell and charge them to the same voltage before assembly. It is crucial that the voltage of