I have the Ego walk behind mower, blower, and the power head string trimer/hedge trimmer
Expensive but I'd buy it again. I have three different sized batteries but they all will work any any device.
The larger battery that came with the mower will get my whole yard as long as it's not too long or too wet. If either of those are the case then it tends to stall if you're not careful because my grass is zoysia and is very thick, and it'll run through the battery before I'm done. Rough guess using google map's measure tool, maybe 7,000 Sf of grass
I got sick of pulling that cord for things that didn't feel like running today, and much prefer pressing a button...Bonus for a nice low hum that doesn't demand hearing protection