USB-S001 Charger - Input DC 5V - Output DC 4.2V 420mA

5V/2.1A Charging Input 6x 18650 Battery Mobile Powe Bank Case Shell DIY Kit E

Sony BC-CSD Battery Charger Input 100-240V Output 4.2V

5V/2.1A Charging Input 6x 18650 Battery Mobile Powe Bank Case Shell DIY Kit G

1/5PCS PWM to DAC Converter Input Pulse Signal Output 0-5V/0-10V Voltage Analog

high voltage generato module input dc 3V -6V output 10KV Step-up Power Module