ENERGY STAR® is the government-backed symbol for energy efficiency, providing simple, credible, and unbiased information that consumers and businesses rely on to make well-informed decisions. ENERGY STAR is the simple choice for energy efficiency, making it easy for consumers and businesses to purchase products that save them money and protect the environment. ENERGY STAR Wi-Fi CERTIFIED™ is an internationally-recognized seal of approval for products indicating that they have met industry-agreed standards for interoperability, security, and a range of application specific protocols. Wi-Fi CERTIFIED products have undergone rigorous testing by one of our independent Authorized Test Laboratories. When a product successfully passes testing, the manufacturer or vendor is granted the right to use the Wi-Fi CERTIFIED logo. Certification means that a product has been tested in numerous configurations with a diverse sampling of other devices to validate interoperability with other Wi-Fi CERTIFIED equipment operating in the same frequency band. Certification is available for a wide range of consumer, enterprise, and operator-specific products, including smartphones, appliances, computers and peripherals, networking infrastructure, and consumer electronics. At retail, the Wi-Fi CERTIFIED logo gives consumers confidence that a product will deliver a good user experience. Service providers and enterprise IT managers specify Wi-Fi CERTIFIED to reduce support costs and ensure a product has met industry-agreed requirements. Y <b>Higher Performance When You Need It Most</b> Intel® Turbo Boost Technology 2.01 accelerates processor and graphics performance by increasing the operating frequency when operating below specification limits. The maximum frequency varies depending on workload, hardware, software, and overall system configuration. 2.0 Legacy Intel® Core™ Processor Intel Core i5-2xxx DIRECTIVE (EU) 2022/2380 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 23 November 2022 (Part III) y Lenovo ThinkPad T420s, Intel® Core™ i5, 2.5 GHz, 35.6 cm (14"), 1600 x 900 pixels, 4 GB, 128 GB Lenovo ThinkPad T420s. Processor family: Intel® Core™ i5, Processor model: i5-2520M, Processor frequency: 2.5 GHz. Display diagonal: 35.6 cm (14"), HD type: HD+, Display resolution: 1600 x 900 pixels. Internal memory: 4 GB, Internal memory type: DDR3-SDRAM. Total storage capacity: 128 GB, Optical drive type: DVD-RW. On-board graphics card model: Intel® HD Graphics 3000, Discrete graphics card model: Intel® HD Graphics. Operating system installed: Windows 7 Professional. Weight: 1.67 kg https://www.techradar.com/reviews/pc-mac/laptops-portable-pcs/laptops-and-netbooks/lenovo-thinkpad-t420s-1076750/review In a nutshell, the Lenovo ThinkPad T420s is a powerful business portable that's a pleasure to use, but not exactly a looker. With its contourless, black plastic body and sharp edges, it looks like it has climbed straight out of the 90s. Open it up and thi... Excellent performance, Great keyboard, Good build quality, Sharp screen, 160GB SSD Price, Battery life, Gets quite hot https://www.expertreviews.co.uk/laptops/51642/lenovo-thinkpad-t420s-review If there’s one word we would use to describe Lenovo’s ThinkPad range, it’s 'consistent'. The chassis might have got thinner and the components inside are definitely faster, but the T420s looks every bit the same as any other laptop in the range. Its bl... A powerful and versatile laptop, but poor battery life and business-specific graphics mean it should only appeal to professionals ... http://www.zdnet.co.uk/reviews/thin-and-light-laptops/2012/03/15/lenovo-thinkpad-t420s-40095274/ Much of the ThinkPad's design — and particularly the excellent keyboard — is traditional, but it packs plenty of up-to-date specs too: Core i7 CPU, hybrid discrete/integrated graphics, solid-state drive, USB 3.0 and a high-quality multimedia subsystem... Traditional design with solid build quality, Bestinclass keyboard, Matte 16:9 screen, Hybrid discrete/integrated graphics, Fast solidstate drive, Highquality webcam, mic and speakers, Integrated mobile broadband, Configurable specification Expensive, Disappointing battery life