Dell 90W 4.5mm Barrel Adapter
90W · Dell 4.5mm barrel
The Dell 90W 4.5mm Barrel Adapter is a 90W 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 90W or below.
- Wattage
- 90W
- Voltage
- 19.5V DC
- Amperage
- 4.62A
- 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
- For higher-spec Dell Inspiron/Vostro with the 4.5mm barrel. Safely powers 45W/65W Dell laptops with the same tip.
Higher-wattage compatibility
A Dell 4.5mm barrel charger at 90W safely powers any Dell 4.5mm barrel laptop rated 90W 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
What to search for
When buying a replacement, search for “Dell 90W 4.5mm barrel charger LA90NM170” 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 90W 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 90W 4.5mm Barrel Adapter?＋
It powers Dell 4.5mm barrel laptops rated 90W or below, including Dell XPS, Dell Inspiron, Dell Vostro.