Power plug adapter ALIGATOR USB-C to 5.5×2.1 mm for Acer Compaq HP Fujitsu Toshiba

ALIGATOR USB-C to 5.5×2.1 mm power plug adapter converts a USB-C Power Delivery source into a 5.5 × 2.1 mm barrel connector suitable for certain Acer, Compaq, HP, Fujitsu and Toshiba notebooks. The adapter allows modern USB-C chargers, power banks or USB-C PD supplies to deliver DC power to laptops that accept a 5.5×2.1 mm input, making it useful as a travel accessory, replacement or bridging solution between different charging standards.

Advantages

This adapter provides a compact and lightweight way to use USB-C power sources with legacy laptop barrel inputs without modifying the original charger. It supports Power Delivery negotiation through the USB-C source, enabling appropriate voltage and current delivery when the source and the target device are compatible. The construction is designed for straightforward connection, with a USB-C plug on one end and a standard 5.5×2.1 mm barrel plug on the other, reducing the need to carry multiple chargers for devices with different input types.

Suitable for

• Charging laptops from a USB-C PD charger when the laptop uses a 5.5×2.1 mm DC jack
• Using modern USB-C power banks to power compatible older notebooks on the go
• Replacing a lost or damaged proprietary adapter in situations where voltage and polarity match
• Travel or multi-device setups where a single USB-C charger is preferred

Key specifications

• Input connector: USB-C (for USB Power Delivery)
• Output connector: 5.5 × 2.1 mm barrel plug (center polarity positive)
• Designed for: DC power conversion from USB-C PD to barrel jack
• Typical use: charging/powering compatible laptops and notebooks
• Form factor: inline adapter cable with molded connectors for durability

How to use

Connect the USB-C plug to a USB-C PD power source such as a charger or power bank, then insert the 5.5 × 2.1 mm barrel plug into the laptop's DC input jack. Ensure the power source is capable of supplying the voltage and current required by the target notebook and that the laptop accepts center-positive polarity. If the USB-C source supports Power Delivery, select or allow the negotiated output that matches the laptop's requirements before connecting under load. Disconnect when charging is complete or when the adapter feels warm to the touch and power down the source if necessary.

Usage recommendations

Verify the required input voltage and amperage for your laptop and confirm center-positive polarity before use. Use a USB-C power source that supports appropriate Power Delivery profiles and avoid prolonged use with sources that cannot provide sufficient current. Inspect connectors for damage and avoid using the adapter in wet or excessively dusty environments.