19V 4.74A 90W Plug: 5.5 * 2.5

Product Overview

The 19V 4.74A 90W Plug: 5.5 * 2.5 is a high‑performance power adapter designed to deliver reliable, efficient power to a wide range of portable computing devices. With its compact dimensions and robust construction, it serves as an ideal replacement or upgrade for original equipment adapters that may have become worn or damaged.

Key Technical Specifications

• Output Voltage: 19 V DC
• Maximum Current: 4.74 A
• Total Power Output: 90 W
• Connector Size: 5.5 mm (outer) × 2.5 mm (inner)
• Plug Type: Reversible, polarized DC barrel connector
• Input Voltage Range: 100–240 V AC, 50/60 Hz
• Efficiency: Up to 90% under typical load conditions
• Operating Temperature: –20 °C to +70 °C
• Protection Features: Over‑current protection, short‑circuit protection, over‑temperature shutdown

Design and Build Quality

The adapter features a rugged metal housing that dissipates heat efficiently while protecting internal components from mechanical shock. The barrel connector is engineered for secure attachment, preventing accidental disconnection during use. A clear labeling of voltage and current ratings on the casing ensures quick identification and safe handling.

Compatibility

This power adapter is specifically tailored to match the 19 V 4.74 A requirement found in many notebook models, particularly those from brands such as Compaq, CoreParts, and MicroBattery. It can be used with:

• Notebook computers that accept a 5.5 mm outer diameter, 2.5 mm inner diameter DC input.
• Portable devices requiring up to 90 W of power for sustained operation.
• Systems where the original charger has been lost or damaged but the device’s internal circuitry remains unchanged.

Installation and Usage Instructions

1. Verify Compatibility: Confirm that your device requires a 19 V, 4.74 A supply with a 5.5 × 2.5 mm barrel connector.
2. Connect the Adapter: Insert the plug into the device’s power port until it clicks securely.
3. Plug Into Power Source: Connect the adapter’s AC side to a suitable wall outlet or power strip that matches the input voltage range (100–240 V).
4. Check Indicator Lights: Many devices display a charging indicator; ensure it lights up, confirming proper connection.
5. Monitor Device Temperature: During initial use, feel for any excessive heat on the adapter’s housing. Normal operation should not cause noticeable warmth beyond ambient temperature.

Safety Features and Precautions

The adapter incorporates multiple safety mechanisms to protect both the device and user:

• Over‑Current Protection (OCP): Automatically shuts down if current exceeds safe limits.
• Short‑Circuit Protection (SCP): Prevents damage in case of accidental shorting.
• Over‑Temperature Shutdown: Ceases operation if internal temperature rises above threshold, safeguarding against overheating.
• Grounded Design: Ensures proper grounding to reduce electrical hazards.

Performance Highlights

The combination of a high output voltage and substantial current capacity allows the adapter to power devices that demand significant energy, such as gaming laptops or workstations with multiple peripherals. Its efficient design minimizes power loss, which translates into lower operating temperatures and extended lifespan for both the adapter and the device’s battery.

Maintenance Tips