Abstract: A hearing aid having a body member with a window in one side, electronics in the body member including a microphone for converting sound into electrical signals, an amplifier for amplifying the electrical signals, a battery for supplying power to the amplifier, a solar cell for recharging the battery from ambient light, and a socket for receiving a cord connected to a receiver in an ear piece. The amplifier is made up of rugged, reliable parts which are packaged in a protected, shock resistant package. The body member is sealed so that the hearing aid is water tight such that it may be submerged in water without leaking, and may be used in a damp, humid environment with minimal effect on the electronic components of the amplifier. Access ports, which may be sealed, are provided to allow access to the electronics for adjustments to tailor the hearing aid setting to an individual wearer.