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An Ultrabook is a specific type of thin, lightweight laptop that prioritizes portability, speed, and long battery life without sacrificing performance. The term was originally a trademarked marketing term by Intel, introduced in 2011 to classify a premium category of notebooks that could compete with Apple's MacBook Air.

Key characteristics

Slim and lightweight design: Ultrabooks are designed to be highly portable, often weighing less than 3 pounds and measuring less than 0.7 inches thick. They often feature premium build materials like aluminum or magnesium alloy for a sleek, durable feel.

High-performance hardware: Despite their size, Ultrabooks are equipped with powerful, but power-efficient, processors (historically from Intel's Core series), solid-state drives (SSDs), and sufficient RAM. This allows for fast boot times, smooth multitasking, and quick responsiveness.

Long battery life: Ultrabooks use efficient, low-power components and optimized software to deliver extended battery life, often providing 8 to 12 hours of use on a single charge.

Advanced display technology: Many Ultrabooks feature high-resolution displays, and some models include touchscreens for enhanced user interaction.

Limited upgradeability: Due to their compact design, many Ultrabooks have components like RAM and storage soldered directly to the motherboard, which makes upgrades difficult or impossible.

Reduced connectivity: To maintain a thin profile, Ultrabooks often have fewer ports than a traditional laptop. Users who need more connections may rely on adapters or docking stations.