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Black rectangular AC adapter with 5.5 mm barrel connector and long power cord

WAWEIS

WAWEIS 19 V 2.1 A 40 W AC adapter 5.5 mm tip

SKU CH-V7KW-K0KD1

19 V 2.1 A 40 W AC adapter with 5.5 mm tip, 10 ft cord and over-current, over-voltage and short-circuit protection

  • World-wide 100-240 V input for travel use
  • 10 ft total cord length gives flexible placement
  • Four safety protections guard against faults
  • FCC CE RoHS certified for regulated markets
  • 5 mm barrel tip matches listed Asus models

AC Adapter for Asus Laptops

This 19 V 2.1 A 40 W AC adapter replaces the Asus ADP-40KD BB series charger. It fits laptops that require a 5.5 mm barrel tip and accepts 100-240 VAC 50/60 Hz mains input. The unit is built with new components and carries FCC, CE and RoHS certifications.

Thermal and Power Behaviour

Safety circuitry includes over-current, over-voltage, short-circuit and total-power protection to limit heat during normal charging. A smart chip monitors temperature and prevents overheating while the adapter delivers its rated 40 W output. The 10 ft cord allows flexible placement without stretching the cable.

Included Cable and Protection Features

The bundled 10 ft power cord integrates the AC inlet and DC output in one length, so no separate mains lead is needed. Anti-interference materials and improved isolation reduce electrical noise on the line. Over-charge and over-discharge safeguards protect the laptop battery during extended charging sessions.

How it compares

Measured against everything we stock in Laptop Chargers & Batteries, at today’s prices. Recalculated every night.

Price $19.99
Cheaper than about 72% of the 27,790 comparable items (median $30.99).

Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the 5.5 mm tip to my Asus laptop and what is the common mistake?

Plug the 5.5 mm barrel connector firmly into the laptop's DC jack until it seats fully; the common mistake is using a 4.0 mm tip which is too small and will not make contact.

Which part of this 40 W adapter is most likely to need replacement first?

The 10 ft power cord and the 5.5 mm tip endure the most physical stress from bending and unplugging, so they typically wear out before the internal power supply.

What limits continuous operation of this 19 V 2.1 A charger during heavy use?

The 40 W maximum output is the first limit reached; if the laptop draws more than 2.1 A at 19 V the over-current protection will shut the adapter down.

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