This Axiom 44-Watt Power Adapter is uniquely designed for the Microsoft Surface Pro. As a premier provider of replacement laptop batteries and AC adapters for leading OEM brands - every Axiom battery and AC power adapter is uniquely engineered for its designated system. Manufactured under stringent quality standards, Axiom Power accessories are guaranteed 100-percent compatible, won't void the OEM system warranty, and come with an industry-leading 1-year warranty.