Built for business—tested for life The ThinkPad E490 is tested against industry-standard quality checks to ensure reliability. Our ThinkPad E Series PCs undergo a range of testing like hinge life-cycle durability, fan testing to keep thermals in check, vibration and non-repetitive shock tests for everyday handling and transporting, and even keyboard testing to verify sturdiness and longevity of keys and components. When you buy the E490, you get the perfect blend of value and durability.