What Type of Battery Is Used in Active Tags—And What Is Its Voltage?

By RFID Journal

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Ask The Experts › What Type of Battery Is Used in Active Tags—And What Is Its Voltage?
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RFID Journal Staff asked 14 years ago
What kind of battery, and of what voltage range, is utilized in active RFID tags? Additionally, where—and how—is the battery embedded?

—Amar

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Dear Amar,

My understanding is that most active tags use batteries of 3 to 3.7 volts, though that differs between manufacturers. These are usually lithium coin batteries, but I’m not an expert in this area. I reached out to a couple of companies I thought could provide additional information, but I did not hear back from them. Perhaps our readers will chime in.

Active tags are usually encased in a plastic housing that protects the battery, as well as the tag’s antenna and circuitry, so they are not “embedded,” as such. There is a growing use of printed and thin-film batteries that can make RFID labels that are either active or battery-assisted tags. This is an emerging area that holds great promise for improving smart-label performance.

—Mark Roberti


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