Patent ID: 8301238

Claim:
A corrosion-resistant electrotransport drug delivery device comprising an electrical module and a reservoir module, the electrical module and the reservoir module configured to be combined to form a unitary, activated drug delivery device prior to use, wherein the device resists corrosion by electrically isolating a circuitry in the electrical module from a power source, further wherein the electrical module comprises: the circuitry; an electrical output adapted to connect the circuitry to an input connector on the reservoir module when the electrical module is combined with the reservoir module; and at least two power-on contacts between the circuitry and a battery; wherein the battery is isolated from the circuitry by the power-on contacts while at least one of the power-on contacts remain open, and the battery is connected into the circuitry when all of the power-on contacts are closed by battery contact actuators on the reservoir module when the electrical module and the reservoir module are combined; and wherein the reservoir module comprises: an electrical input adapted to electrically connect the circuitry in the electrical module to at least a pair of active electrodes in the reservoir module when the electrical module is combined with the reservoir module; and at least two battery contact actuators each configured to close a corresponding power-on contact when the electrical module is combined with the reservoir module so that the battery is connected into the circuitry and the device is powered on, wherein at least two battery contact actuators are separated from each other.