This 40W 19V 2.1A AC Power Adapter is the perfect replacement charger for ASUS laptops that use the 2.5×0.7mm slim round connector. Designed for compact ASUS notebooks, EeeBook models, Transformer Books, and older ZenBook/VivoBook units, this adapter provides safe, stable, and efficient charging.

Built with advanced protection systems—including over-voltage, over-current, over-temperature, and short-circuit protection—this adapter ensures long-lasting performance and safety for your laptop.

Ideal for home, office, school, travel, or as a backup charger.

✨ Key Features

• ⚡ Output: 19V ⎓ 2.1A (40W)
• 🔌 Connector: 2.5×0.7mm slim round tip
• 🛡 Safety Protections: Over-current, over-voltage, overheating & short-circuit
• 🌍 Input: 100–240V (global travel compatible)
• 💼 Compact, lightweight, easy to carry
• ✔️ Perfect replacement for original ASUS 40W/33W/45W chargers

📦 Package Includes

• 1 × 40W ASUS-Compatible AC Adapter
• 1 × AC Wall Cable

💻 Compatible ASUS Laptop Models (2.5×0.7mm Tip)

This adapter supports a wide range of older ASUS laptops using 19V power and the 2.5×0.7mm connector.

✔ ASUS Eee PC / EeeBook Series

• Eee PC 900 / 901 / 1000 / 1000H
• EeeBook X205 (older versions)
• Eee PC Seashell series

✔ ASUS Transformer Book (Older Models)

• Transformer Book T100 (specific 19V variants)
• Transformer Book T200 (selected versions)

✔ ASUS VivoBook (Early Generations)

• VivoBook X200 / X201 / X202 (models using 2.5×0.7mm tip)
• VivoBook early 11.6" & 13" laptops

✔ ASUS Notebook Series (Old Slim-Tip Models)

• ASUS K-Series (some older models)
• ASUS UL / UX older variants

✔ ASUS Netbooks

• Most ASUS netbooks requiring 19V 2.1A / 1.58A / 1.75A with 2.5×0.7mm DC jack

⚠️ Important Compatibility Notes

• NOT compatible with ASUS 4.0×1.35mm, 5.5×2.5mm, or USB-C chargers.
• Check your original adapter for:
  • 19V output
  • 2.1A (or lower)
  • 2.5×0.7mm DC connector

If these match, this charger is fully compatible.