ToyotaAlphard Alphard AGH30W FWD JP 2018-01 to 2018-102018
Smart-key battery
CR2032 lithium battery (electronic key)
Own-model key battery replacement section (printed p.606): the electronic key takes a CR2032 lithium battery. The 3-1 キー section (PDF p.136) 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. Both key versions (without and with the power back door, PDF p.608 and p.610) take a CR2032.