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Small black plastic USB charger with integrated DC plug, roughly 43 by 26 by 42 mm

Ruth's sister

Ruth's sister internal power cable DC3.6V-12V 18W USB PD

SKU CH-B6XQ-Y0T5Q

Converts 36 V-90 V DC input to 5 V/3 A, 9 V/2 A or 12 V/1.5 A USB PD output up to 18 W

  • 18W USB PD fast charging for phones and power banks
  • Wide 36V-90V DC input suits e-bike battery systems
  • Multiple safety protections prevent over-voltage and short circuits
  • Compact 43x26x42mm plastic housing fits tight spaces
  • USB-A output delivers 5V3A, 9V2A or 12V1.5A

Internal USB-PD charging adapter

This adapter accepts a DC input between 36 V and 90 V and delivers up to 18 W through a single USB port with USB Power Delivery support. It provides selectable output profiles of 5 V at 3 A, 9 V at 2 A and 12 V at 1.5 A for phones, tablets and power banks. The plastic housing measures approximately 43 mm by 26 mm by 42 mm.

Sustained-load behaviour

The unit is rated for a continuous maximum output of 18 W and includes multiple protection circuits for safe operation under load. No active cooling is present, so thermal performance depends on ambient airflow within the enclosure. Output voltage remains stable across the declared 36 V to 90 V input range.

Upgrade context

It replaces a fixed-voltage DC-DC converter when a device needs USB-PD negotiation for faster charging. The jump is worthwhile when the source voltage falls between 36 V and 90 V and the target device supports 9 V or 12 V PD profiles. It is not suited for systems requiring more than 18 W or multiple simultaneous outputs.

Highlights

  • 18W USB PD fast charging for phones and power banks
  • Wide 36V-90V DC input suits e-bike battery systems
  • Multiple safety protections prevent over-voltage and short circuits
  • Compact 43x26x42mm plastic housing fits tight spaces
  • USB-A output delivers 5V3A, 9V2A or 12V1.5A

Specifications

No published specifications for this item yet.

Questions about this item

How much heat does the adapter produce when it runs continuously at 18 W?

The unit has no fan and relies on its small plastic case to dissipate heat; prolonged full-load use will make it warm to the touch.

What power source must I already have to use this adapter?

You need a DC supply between 36 V and 90 V — typical e-bike battery packs — with a connector that fits the adapter’s input terminals.

Will the USB port charge an older phone that only accepts 5 V 1 A?

Yes, the adapter negotiates down to 5 V 3 A, so a legacy 5 V 1 A device will draw only the current it requires.

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