This 3D-printed battery holder is designed for 18650 batteries. It features slots for securing the batteries with nickel strip welding wire (8x0.15mm) for connecting the battery terminals. The design includes screw holes for stable mounting, making it suitable for a variety of projects. The holder supports both series and parallel configurations, offering flexibility for different power setups. This user-friendly model is easy to print and assemble, making it ideal for hobbyists and professionals alike.