Greenworks PRO 16 in. 60-volt Battery Cordless String Trimmer (Tool-Only) 60v ST60L04 - Walmart.com
Amazon.com : WORX WA3012 20V Power Share PRO 4.0Ah Lithium-Ion High-Capacity Battery, Black and Orange : Tools & Home Improvement
Greenworks Pro 60-volt Max 16-in Straight Cordless String Trimmer (Battery & Charger Included) at Lowes.com
Battery Eater Pro - Download - CHIP
ECHO eFORCE 56V X Series Brushless Cordless Battery Attachment Capable 17 in. Swath String Trimmer w/ Speed-Feed (Tool Only) DPAS-2600SBBT - The Home Depot