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"A full line replacement battery company for over 40 years, OSI Batteries is truly your One Source for all your replacement battery needs. Offering thousands of replacement battery options for almost any kind of equipment, we support all types of businesses and government agencies in communications, industrial and medical industries. Our team delivers personalized one-on-one customer service and stands behind every order. Conveniently order by phone, by email, or by the web - OSI makes battery buying easy!