Laptop power adapter Asus 45W 19V 2-pin 4.5mm PHI plug

Replacement laptop power adapter for Asus with 45W output and 19V DC designed for notebooks that use a 4.5 mm PHI plug and a 2-pin AC input. This compact adapter delivers stable power for charging and running compatible Asus laptops at home, in the office, or while traveling. The form factor and connector type match common Asus models that require a 4.5 mm barrel plug with a centre pin.

Advantages

The adapter provides a consistent 19V output and up to 45W power delivery to ensure reliable battery charging and system operation. Its compact design reduces bulk and makes it easy to carry in a laptop bag. Built-in safety features protect against overcurrent, overvoltage and short circuits, while the standardized 4.5 mm PHI plug ensures a secure connection with compatible Asus devices.

Suitable for

• Replacing a lost or damaged original Asus laptop charger that requires 19V and a 4.5 mm PHI plug
• Using as a spare charger for home, office, or travel to keep a laptop powered without swapping batteries
• Providing stable power for basic computing tasks such as web browsing, document editing and media playback

Key specifications

• Output voltage: 19V DC
• Maximum output power: 45W
• Connector type: 4.5 mm PHI barrel plug (with centre pin)
• AC input: two-pin mains connector
• Form factor: compact external AC adapter
• Protection features: overcurrent, overvoltage and short-circuit protection

How to use

Connect the adapter to a suitable AC mains outlet using the included two-pin cable, then plug the 4.5 mm PHI connector firmly into the laptop DC input jack. Confirm that the laptop indicates charging or external power before use. For best results, power the laptop off or use in low-load states while the battery charges; avoid bending the cable sharply near the connector to prevent wear. Unplug the adapter from the mains when not in use for extended periods.

Usage recommendations

Use this adapter only with compatible Asus laptops that require 19V and a 4.5 mm PHI plug. Verify the laptop’s voltage and connector type before purchase. If the laptop does not show charging after connection, check the connector seating and mains supply; consult an authorized service provider for further diagnostics. Avoid exposing the adapter to moisture, excessive heat or heavy impact to maintain safe operation.