ToyotaVellfire Vellfire TAHA40W JP 2023-06 to 2023-122023
Smart-key battery
CR2450 lithium battery (electronic key)
Own-model electronic key battery replacement page: the electronic key takes a CR2450 lithium battery. The 3-1 キー page of the same Vellfire edition states that the electronic key is handed to every customer (お客様へ次のキーをお渡しします), with no grade exception.