INTRODUCTION: Regardless of the brand or model of hearing all of them demand for one battery to power its electronic circuit. A battery is a device for converting chemical energy into electrical energy with a set amount of voltage and current needed to power an electrical circuit or electronic, but with a limited life span. In Brazil, the batteries for hearing aids are marketed by international brands in sizes numbered 10, 312, 13 and 675. OBJECTIVE: Analyze the dynamic performance of eight brands of batteries for hearing aids available in the Brazilian market. MATERIALS AND METHODS: It was acquired locally eight brands of batteries for hearing aids in four sizes mentioned above, which are submitted to the same standard of performance test in laboratory, in accordance with Annex G of IEC 60086-1. RESULTS: Some brands predominated in certain sizes, however, there is not a brand that predominates among the others in four sizes. CONCLUSION: The study showed up which brands and sizes of batteries with better performance, which may contribute to the reader favors the best performance at the expense of those of poorer performance. KEYWORDS: Hearing aids, Batteries, Reference Standards, Laboratory Equipments.
