Power adapter Dell 90W 19.5V 3.34A model 492-BBCU for compatible Dell laptops

The Dell 90W AC power adapter delivers 19.5V at 3.34A to power and charge compatible Dell laptops. This compact, rectangular adapter is designed for everyday use at home, in the office, or while traveling, providing stable DC output to maintain system operation and recharge the internal battery. It is suitable as a replacement or spare unit for systems that accept a 19.5V/3.34A input and the appropriate barrel connector.

Advantages

The adapter supplies a consistent 19.5V/3.34A output to support laptop performance under normal workloads and charging conditions. Its compact form factor reduces bulk in a bag and simplifies desk organization. Built-in safety features help protect against overcurrent, overvoltage and short-circuit conditions, contributing to reliable charging and prolonged device life when used correctly. The unit is compatible with a range of Dell notebooks that use the same voltage and connector type.

Suitable for

• Daily charging and powering of compatible Dell laptops
• Replacing a lost or damaged original power adapter
• Keeping as a spare adapter for travel or office use
• Powering a laptop during software updates, backups, or long work sessions

Key specifications

• Output voltage: 19.5 V DC
• Output current: 3.34 A
• Rated power: 90 W
• Connector type: Dell-style barrel connector (standard for compatible models)
• Input: AC mains input, suitable for standard household and office outlets
• Form factor: compact rectangular adapter with integrated cable

How to use

Connect the adapter to an appropriate mains outlet using the supplied mains lead, then plug the barrel connector into the laptop’s DC input jack until it seats securely. Verify the laptop indicates charging or external power is present. For first-time use with a depleted battery, allow the battery to charge until the system reports sufficient battery level before unplugging. Disconnect the adapter by removing the barrel plug from the laptop first and then unplugging the mains lead from the outlet if needed.

Recommendations

Use the adapter with laptops that accept a 19.5V/3.34A input and the matching connector. Avoid exposing the adapter to moisture, extreme temperatures, or heavy dust. Ensure cables are routed to prevent strain at the connector and avoid coiling the power cord tightly while the adapter is in use to reduce heat buildup. If the laptop or adapter shows signs of fault (unusual noise, smell, or overheating), stop use and have the unit inspected or replaced.