BTI Replacement Battery for Lenovo Thinkpad T470 T480 T570 T580 P51S A475 replacing OEM part number 4X50M08811 61+ // 10.8V 4400mAh

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.

BTI specializes in the design, manufacturing and distribution of rechargeable batteries and power related products. Our Research & Development team consists of experienced engineers and technicians who release an average of 75 new notebook computer battery models each year. BTI has made a significant investment in custom circuit design and has circuit board level SMT production capabilities. Extensive knowledge and training in rechargeable lithium ion & lithium polymer battery development, combined with the use of UL certified components, has enabled BTI to develop a safe and reliable line of power products.