If you are looking for 14" mower - get this one. SMALL, light, SILENT, easy to use. I originally looked into it's bigger brothers and Black&Decker siblings, but when I lifted them in the local store - there's no way I'd be willing to use 90lbs/45kg+ tank in our small yard.
The assembly takes about 2 minutes and you are ready to go. My battery was 3/4 full. But recharged it before use.