Dell 45W 4.5mm Barrel Adapter

45W · Dell 4.5mm barrel

The Dell 45W 4.5mm Barrel Adapter is a 45W replacement charger that connects via the Dell 4.5mm barrel using Dell DC barrel (1-wire ID). It is suitable for Dell only laptops rated 45W or below.

Wattage
45W
Voltage
19.5V DC
Amperage
2.31A
Connector
Dell 4.5mm barrel
Connector size
4.5mm x 3.0mm, centre pin
Protocol
Dell DC barrel (1-wire ID)
E-marked cable required
No
Risk level
medium
Verification
verified

Safety information

Higher-wattage compatibility

A Dell 4.5mm barrel charger at 45W safely powers any Dell 4.5mm 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 Dell 4.5mm barrel — how to identify it→

Compatible laptop families

Ships as standard with the Dell XPS 13 9360.

What to search for

When buying a replacement, search for “Dell 45W 4.5mm barrel charger LA45NM140” and confirm the wattage and connector match the specs above.

Frequently asked questions

Can I use a higher-wattage Dell 4.5mm barrel charger instead of the Dell 45W 4.5mm Barrel Adapter?＋

Yes. A charger with the same connector (Dell 4.5mm 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 Dell 45W 4.5mm Barrel Adapter?＋

It powers Dell 4.5mm barrel laptops rated 45W or below, including Dell XPS.

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