My take on this after reading this entire thread is, that at this time, battery powered handhelds are largely going to be a novelty, with regards to commercial use. There are those who will purchase them, simply because they like to be able to say they have the newest thing on the block, just like they have to upgrade their TV or cell phone every time something new hits the market, even if what they have works perfectly well. Myself, I'm one of those "wait and see" type of individuals, and likely I won't be in this business long enough to see a time when battery powered is more economical and/or, legislated into use in this area. I can, however, almost guarantee that they will, at some point, in some areas, become mandatory. It is my understanding that there are cities now that ban gas-powered blowers, so adding trimmers, edgers, chainsaws to that list, is just a natural progression. Now, if I were a homeowner, who ran my trimmer maybe 20 minutes or so a week, and never left the house with it, I might seriously consider one of these units. No gas can to store, no mix to buy, no having to mess with mixing, and no reason to purchase an extra battery. Just buy the trimmer with one battery and the slow, and I'm guessing, cheaper charger, and you are in business.