This PCB is a sled designed for builds that use 3 18650 batteries wired in series and is fitted for a Hammond 1590b/ 1591b enclosures or larger. These boards are made with 2 oz. cooper and are 1.6mm thick, making them far more sturdy that any 3D printed sled extruded using ABS or PLA plastic materials. A surface mounted PFET is required on the sled to complete electrical connections and to provide reverse polarity protection. Included with these boards are 6  tin/nickel coated stainless steel battery clips. These clips custom made to securely hold batteries in place without damage to the outer wrapping.