Asus 45W 4.0mm Barrel Adapter
45W · Asus 4.0mm barrel
The Asus 45W 4.0mm Barrel Adapter is a 45W replacement charger that connects via the Asus 4.0mm barrel using Asus DC barrel. It is suitable for Asus only laptops rated 45W or below.
- Wattage
- 45W
- Voltage
- 19V DC
- Amperage
- 2.37A
- Connector
- Asus 4.0mm barrel
- Connector size
- 4.0mm x 1.35mm
- Protocol
- Asus DC barrel
- E-marked cable required
- No
- Risk level
- medium
- Verification
- verified
Safety information
- For Asus Vivobook Go and older Vivobook/Zenbook with the thin 4.0x1.35mm barrel. NOT USB-C.
Higher-wattage compatibility
A Asus 4.0mm barrel charger at 45W safely powers any Asus 4.0mm barrel laptop rated 45W or below. A charger rated HIGHER than the original wattage is safe, provided connector type, polarity and (for barrel) tip size and voltage all match. The laptop draws only the current it needs.
Example: a 90W HP Smart adapter safely powers a 65W HP laptop. A 65W USB-C PD charger safely powers a 45W USB-C laptop.
Connector
Uses the Asus 4.0mm barrel — how to identify it→Compatible laptop families
Ships as standard with the Asus Vivobook Go 15.
What to search for
When buying a replacement, search for “Asus 45W 4.0x1.35mm charger ADP-45” and confirm the wattage and connector match the specs above.
Frequently asked questions
Can I use a higher-wattage Asus 4.0mm barrel charger instead of the Asus 45W 4.0mm Barrel Adapter?＋
Yes. A charger with the same connector (Asus 4.0mm barrel) at an equal or higher wattage is safe — your laptop only draws the power it needs. A lower-wattage charger may charge slowly or not at all.
Which laptops use the Asus 45W 4.0mm Barrel Adapter?＋
It powers Asus 4.0mm barrel laptops rated 45W or below, including Asus Vivobook.