Power adapter Dell 90W 19.5V 3.34A (MMYMF) for compatible portable devices

Dell 90W 19.5V 3.34A (MMYMF) power adapter is an AC-to-DC external adapter designed to supply a stable 19.5 volt output and up to 3.34 amperes for compatible portable devices and laptops. The adapter provides up to 90 watts of nominal power and includes a standard AC input and a DC output connector suitable for systems that accept this voltage and current rating. It is intended as a replacement or spare for users who need a reliable mains-powered charging solution.

Advantages

The adapter delivers a consistent 19.5V output with up to 3.34A current capacity, supporting stable charging and operation under normal workloads. Its 90W power rating is suitable for many mainstream laptops and portable devices that require moderate power. The unit is compact for an external power brick and designed for ease of replacement, with standard AC input compatibility for common mains outlets. Built-in safety features protect against over-current, over-voltage, and short-circuit conditions, helping to maintain device safety when used as specified.

Suitable for

• Replacing a lost or faulty 19.5V/3.34A adapter for compatible laptops
• Office or home use where a stable 90W power supply is required
• Travel with devices that accept the same DC connector and voltage
• Keeping as a spare adapter for multi-device households or shared workspaces

Key specifications

• Output voltage: 19.5 V DC
• Output current: up to 3.34 A
• Maximum output power: 90 W
• Input: universal AC mains input compatible with common outlet voltages
• Connector type: standard DC barrel connector for compatible Dell devices (verify plug size with device)
• Protections: over-voltage, over-current and short-circuit protection

How to use

Confirm that your device accepts a 19.5V DC supply and that the required current does not exceed 3.34A. Connect the adapter to the mains using the supplied AC lead, then insert the DC output plug into the device power input securely. When connected, the adapter will provide power and charge the device battery if supported by the device. Disconnect the mains and DC plug when not in use or before transporting the device. Periodically inspect the cable and connector for damage and avoid using the adapter if any insulation or connector parts are compromised.

Recommendations

Verify device compatibility before use: check your device’s voltage and current requirements and confirm the DC plug fits. Use the adapter in environments within the rated ambient temperature and avoid exposing it to liquids or extreme heat. For prolonged charging, ensure adequate ventilation around the adapter to prevent overheating and replace the adapter if it shows signs of wear or malfunction.