Greenworks Pro 4 Ah Lithium Ion (li-ion) at Lowes.com
Amazon.com: TenHutt 【Upgrade for Greenworks 60V】 5.0Ah Replacement Battery for Greenworks PRO 60V Max Lithium Ion Battery LB60A03 LB60A02 LB60A00 Cordless Power Toolt Battery(NOT for Greenworks 80V/Powerworks) : Tools & Home Improvement