www.islproducts.com ISL Products International Ltd. info@islproducts.com 9V Battery Charger for T.E.N.S Machines – Case Study Overview: ISL was approached by a company who manufactures T.E.N.S. machines (Muscle stimulator machines used for physical therapy). They needed a unique 9V battery charger for their application. We were asked to manufacture this product because their current supplier, a major Japanese manufacturer, refu

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