BTI has become one of the leading manufacturers of batteries and accessories for notebook computers. It offers products for many manufacturers' notebook computers and cellular phones. By maintaining strict quality standards in production, as well as in sourcing, BTI is able to provide consistent, high-capacity and durable batteries.This product is designed for the following Toshiba systems:Satellite M30;Satellite M30-S309;Satellite M30-S3091;Satellite M30-S350;Satellite M30-S3501;Satellite M30-S735;Satellite M30-S760;Satellite M30-SP309;Satellite M35;Satellite M35-S320;Satellite M35-S359;Satellite M35-S456;Satellite M35-S4561.