Wearable device with conductive traces and insulator

A wearable device for monitoring physiological signals in a user, the wearable device comprising:

• at least one battery, the at least one battery comprising a first terminal on a first side of the at least one battery and a second terminal on a second side of the at least one battery;
• an electrode configured to detect physiological signals;
• a circuit board configured to process the physiological signals;
• a battery terminal connector comprising a conductive trace that is disposed on a non-conductive insulating layer;
• and
• a resistor formed from a conductive material having a higher resistance than the conductive trace, wherein at least a portion of the resistor is connected to the conductive trace and the circuit board, and wherein at least a part of the resistor is external to the electrode and is disposed within a horizontal plane of the conductive trace and disposed on the conductive trace that is disposed on the non-conductive insulating layer.