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The ReSound 675 Zinc-Air Hearing Aid Battery is a high-power, long-lasting battery designed specifically for super-power and behind-the-ear (BTE) hearing aids. Known for its reliable performance, consistent voltage, and eco-friendly mercury-free design, the 675 battery is the largest capacity option available for hearing aids.Each pack contains 5 strips (30 batteries total), making it convenient and cost-effective for regular users. With a typical capacity of 620 mAh, these batteries ensure stable performance for advanced hearing aids that require higher energy, including wireless streaming features.