A flexible circuit combination electrode-battery assembly for a transcutaneous electrical neuro or muscular stimulation unit is provided, which is capable of being removably attached to both the patient and the transcutaneous electrical neuro or muscular stimulation unit. The assembly is generally comprised of two sided electrodes imprinted on a flexible, non-conductive substrate, and batteries for providing power. The design relies on a conductive via or holes in the non-conductive substrate filed with a conductive material to transfer current from one side of the non conductive substrate to the other. An optional resistor may be included to allow the electrode assembly to program a TENS device. An electrically conductive hydrogel or conductive adhesive is provided for attachment to the patient and for ensuring the integrity of the electrical contact with the patient.