BTI 42T4791 compatible 56Wh 6-cell battery for Lenovo Thinkpad T410/20/30 T510/20/30

Battery Technology, Inc. (BTI) is a global supplier of replacement batteries & AC power adapters for notebook computers; batteries for digital cameras, PDA's and other mobile devices and batteries for APC/UPS systems. With production facilities in California and Hong Kong, BTI maintains an unparalleled level of product availability for customers in North America while forecasting and managing the timely delivery of finished goods worldwide.