Greenworks™ 40-Volt Lithium-Ion Battery at Menards®
Amazon.com: Greenworks 2 x 24V (48V) 21" Brushless Cordless Self-Propelled Lawn Mower, (2) 5.0Ah USB Batteries (USB Hub) and Dual Port Rapid Charger Included : Everything Else
Greenworks Greenworks 2 x 24V (48V) 17" Brushless Lawn Mower, (2) 4Ah USB Batteries and Dual Port Charger + 24V Brushless Drill/Driver in the Power Equipment Combo Kits department at Lowes.com
Greenworks 40V 4.0 Ah Lithium Ion Battery, 29472 - Walmart.com