Laptop power adapter Dell 90 W 19.5 V 4.5 A with 4.5 mm tip (ADPT,AC,90W,CHNY,4.5MM,E4,V4)

Replacement laptop power adapter for Dell notebooks providing 90 W output at 19.5 V and 4.5 A with a 4.5 mm barrel connector. This adapter converts AC mains power to the DC voltage required by compatible Dell laptops and supports battery charging as well as stable system operation during typical office and home use. It includes standard safety protections to reduce the risk of overcurrent, overvoltage and short-circuit conditions and is intended as a direct replacement for corresponding 90 W Dell adapters with a 4.5 mm tip.

Advantages

The adapter delivers a consistent 19.5 V, 4.5 A output designed to match the power profile of many Dell notebook models that use a 4.5 mm barrel connector. Built-in protection circuits help safeguard the laptop and battery from common electrical faults. Its form factor and connector type are compatible with systems that require a 90 W supply, enabling reliable charging and operation under normal workloads. The adapter is suitable for direct swap-in replacement without the need for configuration changes.

Suitable for

• Charging and powering Dell laptops that require 19.5 V, 4.5 A and a 4.5 mm barrel connector
• Use in office, home and study environments for typical productivity tasks
• Replacing a lost or defective 90 W Dell power adapter with matching connector and voltage

Key specifications

• Output power: 90 W (nominal)
• Output voltage: 19.5 V DC
• Output current: 4.5 A
• Connector type: 4.5 mm barrel tip
• Input: AC mains (standard voltage range for desktop adapters)
• Protection features: overcurrent, overvoltage and short-circuit protection
• Intended use: external AC-to-DC laptop power adapter

How to use

Connect the adapter to an appropriate AC mains socket using the supplied or compatible power cord. Plug the 4.5 mm barrel connector firmly into the laptop’s power jack. Ensure the laptop’s power indicator shows charging or external power; if not, verify the connection and mains supply. Disconnect the adapter by removing the barrel connector from the laptop and unplugging the mains cord when the adapter is not in use or before transporting the laptop. Allow the adapter to cool by providing adequate ventilation during extended use.

Usage recommendations

Use the adapter only with laptops specified to accept 19.5 V and 4.5 A through a 4.5 mm barrel connector. Avoid exposing the adapter to moisture, extreme temperatures or physical impact. Do not attempt to open or modify the adapter; servicing should be performed by qualified technicians. For optimal longevity, unplug the adapter when not charging for prolonged periods and avoid running heavy sustained loads that can increase operating temperature.