Patent ID: 8831257

Claim:
An exterior power supply for hearing aid, comprising: a battery-shaped conductor adapted to be received in a battery container of a hearing aid and having a top electrode and a bottom electrode; two thin power contacts mounted to the battery-shaped conductor and respectively and electronically connected to the top and bottom electrodes of the battery-shaped conductor, wherein each thin power contact has a thickness being thinner than a gap between an opening and a door of the battery container of the hearing aid; and a DC power source electronically connected to the battery-shaped conductor through a power wire and the thin power contacts to output DC power to the top and bottom electrodes of the battery-shaped conductor; wherein the battery-shaped conductor further comprises: an insulation body further having a first through hole formed through the insulation body, wherein one of front ends of the thin power contacts is mounted on a top of the insulation body and next to the first through hole; and a second hole formed on the top of the insulation body, wherein the front end of the other thin power contact is mounted in the second hole; a conductive plate used as the bottom electrode and mounted on a bottom of the insulation body and further having a hollow pole inserted to the first through hole, wherein a first screw is threaded into the first through hole from the top of the insulation body to the hollow pole; an insulation plate covering the top of the insulation body and the front ends of the thin power contacts and having a hole aligned with the second hole of the insulation body; and an insulation housing covering the insulation plate, the front ends of the thin power contacts, the top and outer sides of the insulation body, and having a side opening through which the thin power contacts pass; and a through hole aligned with the hole of the insulation plate, wherein a second screw is threaded into the through hole of the insulation housing, the hole of the insulation plate, through the front end of the thin power contact and the second hole of the insulation body, wherein a top of the second screw on a top of the insulation housing is used as the top electrode.