![]() There are four different hearing aid battery sizes: 10, 13, 312, and 675. Choosing The Right Battery For Your Hearing Aid Through continuous investments and improvements, Rayovac is able to deliver new, innovative battery technology that features peak performance in today’s devices. Rayovac has been manufacturing hearing aid batteries in Portage, WI for over 50 years. Made in the USA with US and Global Parts ++ These batteries come with our four-year freshness guarantee so you can be confident in your purchase. With Active Core Technology, our battery lasts up to two days longer than our previous formulation +. No Hearing Aid Battery Lasts Longer **Our improved battery design and formulation deliver more power to ensure no hearing aid battery lasts longer **. This long-lasting formula provides consistent, high-quality performance throughout the life of the battery. Rayovac Extra Hearing Aid Batteries Size 13, are engineered with an advanced formula that performs in the most power-hungry hearing devices ††.
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