Toyota have been using this moto as the greatest advantage of the hybrid system against plug-ins and Ev's, since the prius introduction about 20 years ago. Due to journalists anti-Toyota agenda, public opinion never realized how true is this. Most people don't realize that Toyota/Lexus hybrids are more efficient, because they use free energy! Their battery EV range is only 1 mile, but more than 50% of your trip distance is free no matter how long is your trip! The HSD/LHD systems recharge the tiny battery, using energy otherwise wasted. This is not just electric energy, it is free energy instead! They use a similar technology on Hydrogen Mirai.