AC adapter Dell 45W 19.5V 3.34A model 3J9PW for compatible laptops

The Dell AC adapter 45W (model 3J9PW) supplies 19.5V at 3.34A to charge and power compatible Dell laptops. This compact external power supply uses a standard barrel connector and provides stable output for everyday mobile use, office tasks, and travel. Built-in protection against overcurrent and short-circuit conditions helps maintain reliable battery charging and device operation while keeping the adapter lightweight and easy to carry.

Advantages

This 45W Dell adapter offers consistent voltage regulation and efficient power delivery suitable for low- to mid-power laptop models. Its compact form factor makes it convenient to pack for commuting or business trips. Integrated safety features reduce the risk of damage from power surges and help prolong the lifespan of the connected laptop battery. The adapter's design supports continuous operation during intensive tasks as long as the laptop's power requirements do not exceed the adapter's rated output.

Suitable for

• Charging compatible Dell laptops with a 19.5V, 3.34A power requirement
• Office workstations where a compact external power supply is preferred
• Travel and mobile use as a lightweight spare or replacement charger
• Replacing a lost or damaged 45W Dell adapter for routine daily use

Key specifications

• Output voltage: 19.5 V
• Output current: 3.34 A
• Rated power: 45 W
• Connector type: standard barrel DC plug (compatible with specified Dell laptop inlet)
• Form factor: compact external AC adapter
• Protection features: overcurrent and short-circuit protection

How to use

Connect the adapter to an AC mains outlet using the supplied power cord, then insert the barrel connector firmly into the laptop's power jack. Ensure the connector is fully seated and the laptop indicates charging; avoid bending the cable near the connector while in use. Use the adapter on a hard, flat surface to allow heat dissipation and unplug the unit when not in use for extended periods. If the laptop does not charge, check the outlet, cable connections, and the laptop power jack for debris or damage before attempting again.

Recommendations

Use this adapter only with laptops that require 19.5V and up to 3.34A; using it with devices that need higher current may result in insufficient power. Keep the adapter and cables away from liquids and extreme temperatures. For travel, store the power cord coiled without tight bends to prevent wear. If any unusual heat or noise is observed, disconnect the adapter immediately and inspect for faults.