Backpack set /4 AH battery and double charger 4 20V

\ N1 x battery backpack, 20 V/40 V, PPRA 20 A1 (without battery and charger) 4 x 20 V battery, 4 Ah, PAP 20 B3 1 x Double charger for 20 V battery, PDSLG 20 B1