This study demonstrates that BiTeBr exhibits a significant second-order nonlinear response at room temperature, which can be electrically switched by tuning the Fermi energy. The dominant mechanism is skew scattering, arising from the Rashba spin-orbit interaction (SOI) that gives rise to chiral Bloch electrons. The nonlinear response is robust up to 350 K and can be used for RF rectification in the frequency range of 0.2 to 6 GHz, even at low power levels of ~15 dBm. The findings highlight the potential of materials with large Rashba SOI for harvesting high-frequency and low-power ambient electromagnetic energy, making BiTeBr a promising candidate for wireless charging and energy harvesting applications. The study also provides insights into the scaling behavior and temperature dependence of the nonlinear response, confirming that a strong Rashba SOI is crucial for enabling room-temperature nonlinear responses.This study demonstrates that BiTeBr exhibits a significant second-order nonlinear response at room temperature, which can be electrically switched by tuning the Fermi energy. The dominant mechanism is skew scattering, arising from the Rashba spin-orbit interaction (SOI) that gives rise to chiral Bloch electrons. The nonlinear response is robust up to 350 K and can be used for RF rectification in the frequency range of 0.2 to 6 GHz, even at low power levels of ~15 dBm. The findings highlight the potential of materials with large Rashba SOI for harvesting high-frequency and low-power ambient electromagnetic energy, making BiTeBr a promising candidate for wireless charging and energy harvesting applications. The study also provides insights into the scaling behavior and temperature dependence of the nonlinear response, confirming that a strong Rashba SOI is crucial for enabling room-temperature nonlinear responses.