General description This product is a plastic case with a PCB circuit board designed for assembling and repairing 12V and 10.8V Li-ion batteries. It can accommodate 3 INR18650 battery cells, but it does not include any battery cells. This component is intended for users who are knowledgeable about battery performance and have practical experience in battery assembly. Technical specifications Compatible with: 12V and 10.8V Li-ion batteries Battery cell type: 3 x INR18650 Material: PCB, Plastic, Metal Color: Black Measurement error: +/- 1-3 cm Other information Package Contents: 3 x Battery Storage Box Important notes: No batteries included; only the storage box is provided. Light reflection and different displays may cause slight color variations from the actual product.