System and method for reducing electrical interference of a battery cell

A portable electronic device, comprising:

• a battery comprising:
• a wound set of layers comprising a cathode, an anode, and a separator disposed between the cathode and the anode, wherein the cathode and the anode have different lengths;
• a can housing the wound set of layers;
• a lid disposed atop of the can to enclose the wound set of layers within the can;
• a first tab extending from one of the cathode and anode, the first tab coupled to the lid;
• a second tab extending from the other of the cathode and anode, the second tab coupled to the can;
• a tag coupled to the lid;
• wherein a current flowing through an unopposed portion of the cathode or anode generates a first electromagnetic field;
• wherein the current flowing through the tag generates a second electromagnetic field;
• an electrical component disposed adjacent to the battery, the electrical component generating a third electromagnetic field;
• and
• wherein the second electromagnetic field opposes the first electromagnetic field and the third electromagnetic field.

A method for opposing an electromagnetic field generated by an unopposed portion of a cathode or anode, the method comprising:

• disposing a wound set of layers within a can, the set of layers comprising a cathode, an anode, and a separator disposed between the cathode and the anode, wherein the cathode and the anode have different lengths;
• coupling a first tab extending from one of the cathode and anode to a lid;
• coupling a second tab extending from the other of cathode and anode to the can;
• sealing the wound set of layers within the can using the lid;
• coupling a tag to the lid;
• wherein a current flowing through an unopposed portion of the cathode or anode generates a first electromagnetic field;
• and
• wherein the current flowing through the tag generates a second electromagnetic field, wherein the second electromagnetic field opposes the first electromagnetic field.