Rfid power control and monitoring system

A radio-frequency identification system comprising:

• a hybrid tag, comprising
• (i) an active radio-frequency identification circuit,
• (ii) a passive radio-frequency identification circuit, and
• (iii) a memory;
• an interrogator, operative to wirelessly communicate with the passive radio-frequency identification circuit;
• and
• a scanner, operative to wirelessly communicate with the active radio-frequency identification circuit;
• wherein the memory can be accessed by both the active radio-frequency identification circuit and the passive radio-frequency identification circuit.

A hybrid radio-frequency identification tag comprising:

• an active radio-frequency identification circuit powered by a first power source;
• a passive radio-frequency identification circuit powered by a second power source;
• and
• a memory that can be accessed by both the active radio-frequency identification circuit and the passive radio-frequency identification circuit.

A method for storing and retrieving data. the method comprising:

• (i) powering a memory with a first power source that also powers an active radio-frequency identification circuit;
• (ii) storing data into the memory, wherein the data is stored into the memory by the active radio-frequency identification circuit;
• (iii) powering a passive radio-frequency identification circuit with a second power source;
• (iv) retrieving data from the memory, wherein the data is retrieved from the memory by the passive radio-frequency identification circuit.