Rivian Automotive Inc (NASDAQ:RIVN) has introduced a new software update aimed at improving range loss by over 25% in its R1S and R1T vehicles. The update addresses the issue of battery drain when the vehicles are left idle, a phenomenon known as vampire or phantom drain. Other improvements include the option to use the multi-functional thumb controls on the steering wheel to mute the microphone, swap between calls, or hold the current one to accept another.