Amazon.com: CDIYTOOL ACFHRL2 2-in-1 Pivoting Fixed Line and Bladed Head with 20 Quick-Loading Blades, Polycarbonate Blade Trimmer Head Fit for Ryobi 18V 24V 40V RY40210 RY40210A for Auto Feed String Trimmers :
Electric Power Tool Battery (3x Unit) Replaces Ryobi BPL3650 - 4000 mAh, 36 V, Li-ion | 800115008