Indicator circuit decoupled from a ground plane

1. An indicator circuit comprising:

a cylindrical battery, the cylindrical battery comprising a positive terminal and a negative terminal;

a two symmetrical loop antenna that is out-of-phase, the antenna comprising at least one antenna trace, a first antenna terminal, and a second antenna terminal, wherein the antenna is wrapped around the cylindrical battery;

a decoupler component, the decoupler component comprising a first decoupler component terminal and a second decoupler component terminal; and

an integrated circuit;

wherein the integrated circuit is electrically coupled to the first antenna terminal and the second antenna terminal; the integrated circuit is electrically coupled to the positive terminal of the cylindrical battery; the integrated circuit is electrically coupled to the first decoupler component terminal; and the second decoupler component terminal is electrically connected to the negative terminal of the cylindrical battery.

2. The indicator circuit of claim 1 , wherein the decoupler component is selected from the group consisting of a resistor, an inductor, and any combination thereof.

3. The indicator circuit of claim 1 , the integrated circuit comprising an analog to digital converter and a communication circuit wherein the integrated circuit is configured to sense a condition of the cylindrical battery and signally communicate the condition to a reader.

4. The indicator circuit of claim 3 , wherein the condition of the cylindrical battery is chosen from the group consisting of over-discharge protection, over-charge protection, remaining capacity determination, voltage determination, cycle life determination, and power management.

5. The indicator circuit of claim 1 , wherein the integrated circuit further comprises a radio frequency identification chip or a near field communication chip.

6. The indicator circuit of claim 1 , the battery comprising a metal housing.