Metabo HPT MultiVolt 36-Volt Lithium-ion Power Tool Battery and Charger (Charger Included) in the Power Tool Batteries & Chargers department at Lowes.com
Good 36v Multi-volt Battery 4ah (18v - 8ah) For Hikoki Hitachi Metabo Hpt 18v 36v Cordless Power Tools For Bsl36b18 - Rechargeable Batteries - AliExpress