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Greenworks PRO 21-Inch 80V Cordless Lawn Mower, Battery Not Included, GLM801600 for $ 178.49
Greenworks PRO 80V 4.0 AH Lithium Ion Battery GBA80400 $ 135.01
Greenworks PRO 80V Lithium Ion Single Port Rapid Battery Charger GCH8040 – $ 40.05
https://www.amazon.com/Greenworks-Lithium-Battery-Charger-GCH8040/dp/B00SSBKZYY/ref=lp_17441085011_1_6?s=lawn-garden&ie=UTF8&qid=1513419128&sr=1-6 [amazon.com]