240W 20V 12A ADP-240EB B Laptop AC Adapter - High Power Replacement

In this review the 240W 20V 12A ADP-240EB B AC adapter is evaluated as a high-capacity replacement for several Asus ROG and ZenBook Pro Duo laptops. The bottom line: it is aimed at power users who need a reliable, high-output charger that matches the original 240W specification. Our review finds the adapter delivers stable 20V/12A output with full protection circuitry, making it a practical choice when the factory adapter fails or for users who need an exact-spec spare.

Key Features

• 240W output: Supplies a full 240W of power so high-performance laptops and GPUs can run at designed speeds without throttling.
• 20V 12A rating: The precise 20V 12A rating matches original equipment requirements for compatible Asus models, reducing compatibility guesswork.
• 6.0 x 3.7mm DC plug: The center pin connector fits the specified DCIN size used on many ROG Zephyrus and Strix models for a secure electrical connection.
• Wide input range: Accepts 100-240V 50-60Hz so it works reliably worldwide with local power sources and standard outlets.
• Protection features: Built-in overcharge, over current, over voltage, short-circuit and overheat protection keep both adapter and laptop safe.
• Complete package: Ships with one AC adapter and a free power cord, ready to use right away without sourcing extra cables.

Who It's For

This adapter is best for owners of compatible systems such as the Asus ROG Zephyrus M16 GU603HR/GU603HM, ROG Strix Scar and G15/G17 series, and the ZenBook Pro Duo 15 OLED (UX582) who need a replacement or spare that matches the original 240W specification. Gamers, content creators and power users who push CPU and GPU performance will benefit from the stable high current delivery.

It is not aimed at users of low-power ultraportables or anyone who needs a universal multi-voltage charger; those users should look for lower-wattage, lighter adapters or USB-C PD solutions. Also confirm the 6.0 x 3.7mm DC plug and model compatibility before purchase to avoid connector mismatch.

Pros & Cons

Pros

• High 240W output keeps high-performance laptops running at full capacity under load.
• Comprehensive protection circuitry reduces risk of damage from electrical faults.
• Wide 100-240V input supports international use without a step-down transformer.
• Includes power cord so the unit is ready to use on arrival.

Cons

• Higher weight and bulk compared with low-wattage chargers, making it less convenient for ultra-light travel.
• Compatibility limited to models with the 6.0 x 3.7mm DCIN and the listed Asus families, so verify fit first.

Specifications

Item	Laptop Charger / AC Adapter
Model P/N	ADP-240EB B
Output	20V 12A (240W)
Input	100-240V 50-60Hz 3.5A
DC Plug	6.0 x 3.7mm with center pin
Package	AC Adapter + 1 Power Cord
Protection	Overcharge, over current, over voltage, short-circuit, overheat

Our Verdict

The ADP-240EB B 240W adapter is a sensible replacement for owners of compatible Asus ROG and ZenBook Pro Duo models who need reliable full-power charging. It matches original output specs, includes common safety protections and comes ready to use with a power cord, making it good value for anyone who depends on sustained performance from a gaming or workstation laptop.

Frequently Asked Questions

Will this adapter work with my ROG Zephyrus M16?
It is compatible with specific M16 models such as GU603HR and GU603HM; confirm your exact model number and the 6.0 x 3.7mm DCIN size before purchase.

Does it include a power cord?
Yes, the package includes one AC adapter and one free power cord so you can plug in immediately.

Is the adapter protected against electrical faults?
Yes, it has built-in overcharge, over current, over voltage, short-circuit and overheat protection for safe operation.