Yes, an active RFID (Radio-Frequency Identification) tag does contain a battery. This is one of the key features that distinguishes active RFID tags from passive RFID tags. Here are some key points about active RFID tags and their use of batteries:
1. Power source: Active RFID tags have their own internal power source, typically a battery.
2. Transmission: The battery allows the tag to actively transmit its signal to the RFID reader, rather than relying on the reader's signal for power.
3. Range: Due to the internal power source,
active RFID tags can transmit over much longer distances compared to passive tags. They can often be read from 100 meters away or more.
4. Data storage: Active tags can typically store more data and have more sophisticated processing capabilities than passive tags.
5. Sensors: The battery power allows active tags to incorporate sensors (e.g., temperature, motion) and continuously monitor and record data.
6. Lifespan: The battery life typically ranges from 3-5 years, though some specialized tags can last longer.
7. Cost: Active tags are more expensive than passive tags due to the battery and additional components.
8. Size: They are generally larger than passive tags due to the battery and additional circuitry.
9. Applications: Active RFID is often used in scenarios requiring real-time tracking over large areas, such as tracking shipping containers, vehicles, or high-value assets.
10. Beacon capability: Some active tags can send out signals at preset intervals, which is useful for constant monitoring applications.
It's worth noting that there's also a category called semi-passive RFID tags, which do have batteries, but use them only to power the chip's circuitry and not to actively transmit a signal. These offer a middle ground between active and passive tags in terms of functionality and cost.
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