May Require Technician To Install This is a 2 cell rechargeable lithium coin battery assembly which is specifically designed for Apple PowerBook 190, 190CS, 5300 and PowerBook Duo 200, 210, 230, 250, 270, 280 series laptop and notebook computers. Provides back up and clock support while system is down. This ENERGY+ item is built with the highest quality standards and safety features. Assembled in the USA