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Power One Evolution Zinc Air Size 13 PR48 (6pcs) p13 1.45v A13 Hearing Aid Battery Batteries 100% Original 100% Brand New Type: zinc air battery Application: hearing aids, and other medical devices that require reliable and efficient power supply. Nominal voltage: 1.45V Model: 13 / PR48 Batteries without mercury content - Hg 0% Quantity: 6pcs 6 hearing aid batteries Power One Evolution Varta type 13 / PR48 Environmentally friendly batteries - mercury-free (0% Hg) MADE IN GERMANY Evolution in density Power One EVOLUTION was developed in response to the needs of consumers who require reliable batteries with longer operating times. The Power One EVOLUTION zinc-air battery is based on Thin Foil Technology (TFT) and is characterized by a very high energy density, with a greatly increased capacity over its predecessor, lasting up to 15% longer. Evolution in technology The Power One EVOLUTION features revolutionary manufacturing technology. Thanks to the innovation of using foil technology (TFT = Thin Foil Technology), the available inner volume can be exhausted and filled with more active material, meaning these batteries have up to 15 percent longer runtime than previous Power One batteries, setting new standards for hearing aid users.