this is my mower, greenworks pro 60v: https://www.greenworkstools.com/col.../pro-60v-brushless-25-inch-lawn-mower-2531502Do you use the self propel the whole time? What mower are you using?
i am able to use the self propel on this mower, most of the time, with about .5 acre. my previous mowers had smaller batteries and had trouble doing the entire yard despite being push mowers. when i got this one i only used the self propel when i needed it but soon realized it had extra capacity so now i use often. i often don't use it if pushing downhill, but definitely use it up hills. this mower has 2 batteries. it uses 1 at a time.
my previous 3 mowers were all black and decker mowers. i acquired additional batteries for the last one so i did not have to stop and charge if i could not finish my lawn. which would happen if the grass was really long or wet.