38mm Rubber Self Bonding Electrical Tape (9 meter) BO Motor wheels or the insulator might be

or the insulator might be covered with a metalized film

First LED from input connector is used to indicate CC(Constant Current) and the other two LEDs indicate battery charging and battery full while the module is used as a battery charger

Sometimes a third terminal for a switch or ground connection

XL4015 DC-DC Step Down Module comes with onboard CC(Constant Current) and CV(Constant Voltage) control feature which is very handy in Applications like battery charger or power supply

These premium heat sinks are ideal for cooling any TO-220 package devices

38mm Rubber Self Bonding Electrical Tape (9 meter) BO Motor wheels or the insulator might beThis is a 3M Scotch HT 38mm Rubber Self Bonding Electrical Tape with a 9. 1 meter length. Scotch Rubber Splicing Tape 23 has greater physical and electrical properties that are unaffected by the degree of stretch. This tape is highly resistant to split, crack and flag when exposed to indoor or outdoor environments. It is designed to splice and terminate cables whose emergency overload temperatures can reach 266 degrees F (130 degrees C). This self