Amazon.co.jp: Panasonic Rechargeable Impact EZ1PD1 Dual (14.4 V/18 V) +BRAIN 155 N m (when using 18 V), Main Unit Only (Battery Pack, Charger, Case Sold Separately, Black, EXENA P Series EZ1PD1X-B :
Amazon.co.jp: Panasonic LJ Type EZ9L54 Lithium Ion Battery Pack (Li-ion) 18 V 5.0 Ah, Large Capacity, High Load Compatible : DIY, Tools & Garden