The characteristic of Semi Active RFID is that it has a built-in battery. There is a small battery inside the tag product. The tag obtains power from the battery to drive the chip and make the tag operate smoothly. By operating in this way, the situation where the signal cannot be transmitted back can be solved. For example, the radio frequency wave of the RFID reader is too weak, and the tag may not be able to successfully transmit the signal back. Therefore, if there is a built-in battery, the tag will have enough power to fully provide signal backhaul.

Therefore, Semi Active RFID will respond faster and have a longer reading range. In addition, the Semi Active RFID tag will not always be on. It will only be activated after receiving the radio frequency waves sent by the reader. This power activation mode can effectively extend the battery life.