3.7v 3.6V 4.2V 1A Micro Usb 18650 Lithium Battery Charging Board Module Charger Modules Tp 4056 Tp4056 Post navigation LM317 DC-DC Converter Buck Step Down Circuit Board Module Linear Regulator LM317 Adjustable Voltage Regulator Power Supply 100pcs 3528 (1210) SMD LED Emitting Diode Lamp Chip Light Beads Warm White Red Green Blue Yellow Orange UV Pink RGB Micro 3V SMT