Best Cordless Yard Tools

I have found that many of my light yard tasks can be performed quicker and simpler with battery powered equipment rather than gas powered. I have been using 18 volt Black and Decker tools, but the batteries do not perform very well. The battery powered tools I primarily use are a chainsaw, polesaw, hedge trimmer, and leaf blower.

There are many different brands of cordless power equipment and many different volt choices within each brand. I would apprecite any advice regarding which brand and voltage you would recommend. Thanks!