Laptop power adapter Energy4U CA07, 65 W, 18.5 V, 3.5 A, 5 mm barrel plug

Energy4U CA07 is a 65 W laptop power adapter that supplies a regulated DC output of 18.5 V at 3.5 A through a 5 mm barrel plug. Designed as a replacement or spare for compatible notebook computers, this adapter delivers the required voltage and current for charging internal batteries and powering laptops during use. Its compact rectangular housing integrates an AC input cord and a fixed DC cable with a 5 mm barrel connector suitable for devices that accept this common polarity and size.

Advantages

The adapter provides stable 18.5 V DC output at up to 3.5 A, ensuring consistent charging and operation without introducing unnecessary noise or voltage fluctuation. At 65 watts total output it supports a range of laptops that require this power level. The 5 mm barrel plug is a common connector size for many notebook models, simplifying compatibility when voltage and current match. The unit is lightweight and intended for use at home, in the office or while traveling.

Suitable for

• Replacing a lost or broken laptop charger that requires 18.5 V and ~3.5 A
• Keeping as a spare adapter for travel or remote work
• Powering laptops that accept a 5 mm barrel DC input with center-positive polarity
• Use in environments where a compact, external AC-powered adapter is needed

Key specifications

• Output voltage: 18.5 V DC
• Output current: 3.5 A
• Maximum output power: 65 W
• Connector type: 5 mm barrel plug (fixed cable)
• Polarity: centre-positive (standard for barrel connectors of this size)
• Intended use: external laptop power supply for compatible notebooks

How to use

Confirm that your laptop requires 18.5 V and approximately 3.5 A and that the 5 mm barrel plug matches the laptop socket before connecting. With the laptop powered off or in a low-power state, insert the barrel plug into the laptop DC input until it seats securely, then connect the AC mains lead to a suitable wall outlet. After connection, verify that the laptop indicates external power or charging. Disconnect the mains before unplugging the adapter from the laptop if possible. Avoid forcing the plug into incompatible sockets.

Usage recommendations

Use the adapter in well-ventilated areas and avoid covering it during operation to prevent overheating. Ensure the plug polarity and voltage match the laptop requirements to prevent damage. Store the adapter in a dry place and protect the cables from sharp bends or crushing. If unsure about compatibility, consult the laptop manufacturer documentation or a qualified technician before use.