EarPower 312 hearing aid batteries can be inserted into all hearing aids that accept 312 size batteries. The capacity supplied with energy is equivalent to other brands (Rayovac, Powerone, etc.). On average depending on the type of devices (the sound setting, etc...) a battery supplied energy for 5 days see more. EARPOWER Brown size 312 batteries are specially designed for hearing aids and compatible with all brands (Audiomedi, Bernafon, Biotone, Ivox, Oticon, Phonak, Resound, Sebotek, Siemens, Sonic, Starkey, Unitron, Vivatone, Widex). EarPower is a brand distributed by Auriseo, a French company based in Paris. These are high-quality hearing aid batteries that have been on the market for over 10 years. Hearing aid batteries are small sized batteries manufactured in specialized factories with a sterile environment with a controlled atmosphere (manufacture takes place in an off-air environment). A312 hearing aid batteries, also known as button batteries (or watch batteries even if they are not quartz batteries) are commonly referred to as zinc air batteries. Nowadays, hearing aid batteries are manufactured without mercury. To insert your hearing battery into your sonotone device, it's very simple: 1) Open the battery drawer 2) Remove the tab of the hearing battery 3) After 1 min, insert the battery into the hearing aid 4) Close the battery drawer There are 5 types of hearing batteries which are batteries 10, 13, 312 and 675. Each of the batteries are color-coded for quick identification: Battery size 10: yellow color Size 312 battery: Brown color Size 13 battery: Orange color Size 675 battery: Color blue
