BLACK+DECKER LST201 20V MAX Lithium Ion String Trimmer/Edger, 10" Part of the 20V MAX System; 1 System - Endless Tasks. Power for your Style Converts from trimmer to wheeled edger Automatic Feed Spool (AFS) automatically feeds trimmer line Adjustable height and handle for ideal user comfort 20V MAX Lithium Ion 1.5Ah battery holds it's charge for up to 18 months