INDUSTRY LEADER OSI Batteries has been a leader in the battery business as a full-line replacement battery company for over 48 years. We are an authorized factory-direct distributor and value-add center of specialty batteries, chargers, and related products from top manufacturers in the industry. OSI delivers professional battery solutions to businesses, medical organizations, and government agencies who rely on battery power to get their jobs done. MANUFACTURING We operate our own in-house battery assembly division capable of custom production orders of any size. OSI is now the master distributor for all Unipower batteries, products, and accessories, and also develops and sells its own brand of quality aftermarket replacement batteries for two-way radios, medical devices, UPS systems, emergency lighting, PLCs, barcode scanners, utility meters, and much more. SERVICE Our customer service team has years of experience finding the right battery solution. Servicing an extensive customer base from military and public safety departments, to schools, hospitals and everyday people, OSI is ready to help with your next battery purchases. Whether it is an OEM replacement battery, an aftermarket battery, or a custom battery, our team delivers personalized, one-on-one customer service and battery advice. We stand behind every order, and ordering is easy and convenient by phone, email, or our website. KNOWLEDGEABLE Our experienced staff provides our customers with extensive knowledge in all aspects of the battery business. From battery assembly knowledge to battery market experience, working with OSI ensures you receive a comprehensive battery buying experience you can depend on. RELIABLE OSI prides itself in providing a reliable, stress-free battery buying experience, and ensures we carry only the highest quality products, while providing fast and accurate delivery. OSI is your One Source in Batteries. We can help power your day, because we know batteries.