The HP 90W 19V 4.74A Replacement AC Power Adapter (7.4mm x 5.0mm) is a high-capacity compatible power supply built to safely run and charge demanding HP laptops and docking stations. Serving as a reliable, cost-effective replacement for lost or damaged factory bricks, it features integrated over-current, short-circuit, and thermal protection layers to shield your laptop’s motherboard. It utilizes the classic large round barrel connector with a center smart-pin to maintain solid machine compatibility.