The EcoPower hydropower sensor faucet from TOTO powers itself using only water. When the faucet is used, water flows through an inline hydropower micro-turbine. As the turbine spins, energy is harnessed and stored in a rechargeable battery, reducing the need for regular maintenance and battery replacement for up to 10 years. TOTO.
ASPE Product Overview--Sensor Faucet
December 16, 2002