I have a cordless electric chain saw very similar to that one. I always carry that thing on my quad when I am in maintenance mode on the trails. Works VERY well. Quiet, light, and I don't have to worry about gas and such for it.
@toomanytoys how long does the battery last? I have been wanting one too.
@Dick It depends what type of wood you are cutting, diameters, ect.
This wasn't total run time, but I recently trimmed 2 to 3" diameter branches off of 5 pine trees on my property. I bet I made 150-200 cuts. One to cut them down, one or 2 to cut them into manageable pieces to put in the burn pile. I'd say I worked for 4 hours total, but used the saw maybe for a solid hour before the battery went dead.
I'd say your run time cutting 10" diameter trees of a hard wood variety would be lower. But for small use its great. I pick it up before I pick up my stihl gas saw when working around home.