Laptop power adapter Energy4U CA09 — 12 V 3 A 36 W, 1.7 mm connector

Energy4U CA09 laptop power adapter delivers a 12 V DC output at 3 A (36 W) through a 1.7 mm barrel connector. It is intended as a replacement or spare adapter for laptops and portable devices that require a stable 12 V / 3 A power source. The adapter accepts standard AC mains input and incorporates basic protection features including overcurrent and short-circuit protection to maintain steady voltage and protect connected equipment.

Advantages

The compact design and modest power rating make the adapter suitable for lightweight, portable use while saving space in bags and on desks. Built-in protection circuits provide reliable operation by reducing the risk of damage from electrical faults. A standardized barrel connector simplifies compatibility with devices that accept a 1.7 mm plug, and the fixed-output configuration ensures a consistent 12 V supply without the need to adjust settings.

Suitable for

• Replacing a lost or damaged 12 V/3 A laptop adapter
• Powering small laptops and netbooks that use a 1.7 mm DC jack
• Running portable peripherals or docking accessories requiring 12 V
• Using as a spare adapter for travel or office backup

Key specifications

• Output voltage: 12 V DC
• Output current: 3 A
• Maximum power: 36 W
• Connector type: 1.7 mm barrel (inner pin outer sleeve)
• Input: standard AC mains voltage compatible with regional outlets
• Protection: overcurrent and short-circuit protection
• Form factor: compact external power brick

How to use

Confirm that your laptop or device requires a 12 V DC input and accepts a 1.7 mm barrel connector before use. Connect the adapter's barrel plug firmly into the device's power jack, then plug the AC lead into a suitable mains outlet. Power on the device; the adapter will provide a steady 12 V supply. If the device fails to charge or power, disconnect immediately and verify connector polarity, jack compatibility and input voltage. Avoid using the adapter with devices that require a different voltage, polarity or connector size.

Usage recommendations

Use the adapter on a flat, well-ventilated surface and avoid covering the power brick during operation. Store the adapter in a dry environment and disconnect from mains when not in use for extended periods. For safety, replace the adapter if the cable or connector shows visible wear or damage.