Greenworks 40-Volt 4 Ah Rechargeable Lithium Ion (Li-Ion) Cordless Power Equipment Battery in the Cordless Power Equipment Batteries & Chargers department at Lowes.com
Greenworks™ 40-Volt Lithium-Ion Battery at Menards®
Amazon.com : Greenworks L-600 40V 6AH Smart Lithium-Ion USB Battery : Tools & Home Improvement