Rayovac Extra Size 10 Batteries$29.99 RAYOVAC®, the #1 Manufacturer of Hearing Aid Batteries, now brings you Clear Sound Technology. Raising the benchmark of product innovation and providing consistent, quality performance through the whole life of the battery. Size 10 Batteries are sold in boxes of 80, and are the most compact long-lasting batteries on the market. Quantity Add to cart Description Our hearing aid batteries are engineered with an advanced formula that performs in the most power-hungry hearing devices††. This long-lasting formula provides consistent, high-quality performance throughout the life of the battery. No Hearing Aid Battery Lasts Longer** Our improved battery design and formulation deliver more power to ensure no hearing aid battery lasts longer**. With Active Core Technology, our battery lasts up to two days longer than our previous formulation+. Long Lasting, Guaranteed!† These batteries come with our four-year freshness guarantee so you can be confident in your purchase. Made in the USA with US and Global Parts++ Rayovac has been manufacturing hearing aid batteries in Portage, WI for over 50 years. Through continuous investments and improvements, Rayovac is able to deliver new, innovative battery technology that features peak performance in today’s devices. 37¢ per battery! Size 10 pack of 80 batteries Three Year Date Code- longest available Larger Tab Design World’s Longest Lasting Battery Made in U.S.A.