using battery kills deal for me.
I prefer the elect ones
The one that I have is corded but I can see a big advantage to getting rid of the cord. It's a pain in the ass when you've got limbs down and it's constantly getting tangled up. Assuming that it's got enough guts to get the job done anyway,
One detail that you should be aware of with these pole saws is that the max height assumes your own height included in the measure. That is, if it says 14 feet then they're assuming that ~5 - 6 feet of that is you. You'll also lose some of that height to angle since you really don't want to stand directly under what you're cutting.
Handy tools overall though. I've gotten a lot of use out of mine.