The raspberry pi has no switch, so it’s trouble to control its power supply except drawing the usb. That’s inconvenient especially in the process of preliminary debugging. So buy a power supply cable with ON/OFF switch is necessary. Not only for raspberry but also your mobile phone and other micro USB devices. It benefits to keeping on your device-battery’s working life.
Product requirements: meet ROHS requirements
Range: USB power output
USB Power Adapter x 1
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