Power adapter Dell 90W 19.5V model 492-10859 for compatible laptops, 3-pin connector

This Dell 90W AC adapter (19.5V) is an external power supply designed to provide reliable power and battery charging for compatible Dell laptops via a 3‑pin connector. The adapter delivers up to 90 watts at 19.5 volts and incorporates built‑in protection against overcurrent and short circuits. Its compact rectangular brick and attached cable make it suitable as a replacement or spare unit for home, office, or travel use.

Advantages

The adapter offers stable DC output to maintain laptop performance while charging the battery and running power‑demanding applications. Integrated safety features reduce the risk of electrical faults, and the 3‑pin connector ensures a secure physical connection. The unit’s 90W power rating supports a range of compatible systems, and its universal AC input accommodates common mains voltages for use in multiple regions with an appropriate mains lead.

Suitable for

• Replacing an original or lost laptop power adapter
• Keeping as a spare power supply for travel or office
• Powering and charging compatible Dell laptops that accept 19.5V, 90W via a 3‑pin connector
• Using with docking stations or mobile work setups that require an external AC adapter

Key specifications

• Output voltage: 19.5 V DC
• Maximum output power: 90 W
• Connector type: 3‑pin laptop power connector
• Protection features: overcurrent and short‑circuit protection
• Form factor: external AC adapter (power brick) with attached DC cable
• Input: standard AC mains input (requires compatible mains lead for region)

How to use

Connect the adapter’s AC mains lead to a grounded wall outlet, then plug the 3‑pin DC connector firmly into the laptop’s power jack. Ensure the connection is secure; the laptop should indicate charging via its status LED or on‑screen battery indicator. When not in use, unplug the AC mains lead first, then disconnect the DC connector from the laptop. Avoid wrapping the cable tightly around the adapter to prevent strain on the cable and connector.

Recommendations

Use the adapter with devices that match the specified output voltage and power rating. If the laptop requires a different voltage or higher wattage, choose a compatible adapter. Replace frayed cables or damaged connectors promptly. For travel, pair the adapter with the correct regional mains lead and avoid exposing the unit to moisture, extreme temperatures, or heavy impact.