The first battery-free hearing aid
EVOKE EC is the first hearing aid to liberate consumers from the inconvenience of conventional batteries. And it doesn’t compromise on sound quality. It’s the first hearing aid to be powered by a technology that runs on fuel cells, and we call this technology WIDEX ENERGY CELL™.
Fuel cell technology has been around since the 19th century. In fact, fuel cells were used as an electrical power source in rockets during the Space Race in the 1960s and ’70s. Today it’s used in the car and space industries, and it’s also used for backup power systems around the world.
Fuel cell technology usually runs on liquids like hydrogen, methane and methanol. That’s why we talk about refilling the hearing aid instead of charging it, as you do with batteries. Unlike rechargeable batteries, refilling a fuel cell is as quick and simple as replacing the fuel. That’s why EVOKE EC can be re-energised in just 20 seconds and, in those few seconds, users get 24 hours of hearing.
How hearing aid sources are different from one another:
| Technology||Charging time || Refill time||Capacity || Life|
| Silver-Zinc|| 8 hours|| || 28mAh|| 1 year|
| Li-ion|| 3 hours|| || 33mAh|| 2½ years|
| ENERGY CELL technology|| || 20 seconds|| 52mAh|| 2½ years|
How it works
The ENERGY CELL technology in EVOKE EC is powered by methanol, an efficient and stable fuel. The ENERGY CELL needs a daily refill of methanol to keep producing energy, and it gets that from the refill unit.
The refill unit doesn’t need to be plugged into an electrical outlet. It’s an off-the-grid casing that houses a replaceable cartridge which contains water and an 80% methanol solution. One cartridge contains enough of the solution to provide a pair of hearing aids with energy for up to four weeks.