A tag receiving part of the power it need to operate from an integrated battery. Usually, the integrated battery is only used to power the chip and not to enhance the transmission signal, still, semipassive tags obtain an increase in the reading range from four to tenfold compared to the passive tags.
Like active tags, they have a limited lifespan but, being the activation triggered by the presence of the reader, they tend to have a shorter life only when they are read frequently.
