I am going on my 4th year with Greenworks products. I bought their 21" self propelled 60v mower, with 2 - 4AH batteries & dual charger, first. I cut about 1/2 acre of grass every week. It takes 3 full charged batteries to cut all this. The batteries recharge in an hour, so that is when I take a break. I would have paid just as much for a good gas self propelled as I did for this one. Loved it so much, I bought their matching 60v string strimmer, blower. hedge trimmer, & chainsaw. That gave me 2 more batteries & 2 more chargers. I have not had a single problem with any of these & will not go back to gas !
TIP :
If you are thinking about their products , go to their website & sign up for e mails. They won't bombard you with e mails, BUT they will send you significant discounts .