Rayovac Extra 13 hearing aid batteries with orange colour coding. Rayovac Extra 13 button cells are high performance, quality hearing aid batteries that have been developed in close co-operation with hearing aid manufacturers worldwide. The zinc-air button cells offer a constant capacity, a long service life and good performance. The batteries have a shelf life of four years.

Specifications Rayovac Extra 13 hearing aid batteries:

• Voltage (V): 1.45
• IEC until October 1990: PR48
• IEC after October 1990: PR754
• Packaging 100% recyclable
• Mercury-free
• Wireless tested
• Diameter (mm): 7.9
• Height (mm): 3.6
• Colour: Orange

Why zinc-air technology for hearing aid batteries? Zinc-air hearing aid batteries have a particularly high energy density and offer an almost horizontal discharge curve. They are the optimum power supply, especially for hearing aids.

The air holes in the battery are initially covered with a protective film to keep them in a "resting state" until they are needed. The system-related self-discharge of zinc-air batteries with a protective film attached is only around 3 % per year. The foil is removed when the battery is inserted into the hearing aid. After a few seconds of activation, the battery begins to emit current. When activated (protective foil removed), zinc-air batteries have a limited shelf life and should be used as soon as possible.

Wireless radio tested Rayovac Extra 13 hearing aid batteries. Wireless radio has become an integral part of hearing aids. Speech signals are transmitted to your hearing aids via the hearing aid accessories. This data transmission requires a constant high current. Rayovac Extra 13 hearing aid batteries offer the quality and stability required for uninterrupted transmission.