these would be perfect for you http://slickdeals.net/f/7648738-greenworks-new-80-volt-tools-sp
I have a 2000-3000sqft lawn, a Black&Decker 24V battery-powered mower served
me well. absolutely no problem, no maintenance needed.
<>: just realized the greenworks tools do not include charger and
battery. in this case, I think what you found look good to me. The CM1836
mower is supposed to be more powerful than my model (CM1200).