WORX Power Share 20-volt Max 17-in Push Cordless Electric Lawn Mower 4 Ah (Battery & Charger Included) in the Cordless Electric Push Lawn Mowers department at Lowes.com
Amazon.com: WORX WA3578 - PowerShare 20V 4.0Ah, Lithium Ion High Capacity Battery, Orange and Black : Electronics
Worx WA3578 20V 4.0Ah Max Li-ion Battery - Walmart.com