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"  Decades ago we developed the Popular Mechanics Axiom: A product&amp;#039;s imperfections don&amp;#039;t usually invalidate it. Unless a tool or machine is so badly designed and built that it&amp;#039;s completely dangerous or cantankerous, it has something to offer. That sounds lenient, but it&amp;#039;s a fact of mechanical life that there are no perfect products; any tool will have features that annoy some users but please others. A product may have a large number of annoying features early in its development cycle. (Think of where cordless drills were 20 years ago and where they are today.)  And there&amp;#039;s no free lunch with tool features. Manufacturers add substance to materials and design as they can afford to, relative to the product&amp;#039;s price. It&amp;#039;s up to you whether you find value in what the manufacturer has added.  If these principles apply to any tool or machine we&amp;#039;ve tested in the last 25 years, it is the battery-powered lawnmower. These tools are small, light, quiet, and start with the push of a button. They&amp;#039;re also a perfect example of products at the beginning of the development cycle. Today&amp;#039;s electric mowers are marked by inconsistent power output and cut quality, and the occasional frustrating design flaw, as we found in our recent test of seven such mowers.  Is one right for you? Check out the pros and cons: Gas-Engine Mowers Pros \u2022 Consistent power output. \u2022 Little sensation of mowing resistance since blade energy slices grass so effectively. \u2022 Sufficient power for bagging, mulching, side discharge across wide spectrum of mowing conditions (i.e., leaves, tall grass, weeds, moisture). \u2022 With careful use, capable of rough mowing (i.e., tall grass, weeds, rough ground). \u2022 Cut quality, bagging, and mulching are consistent because power is consistent. \u2022 Engine produces enough power for high-speed drive system. Cons \u2022 Produces exhaust. \u2022 Loud. \u2022 Blade energy launches debris.  \u2022 Hot surfaces. \u2022 Requires fuel storage. \u2022 Requires tuneup, oil change. Battery-Powered Mowers Pros \u2022 No exhaust. \u2022 Quiet. \u2022 Comparatively less blade energy, making it less likely to launch debris. \u2022 No hot surfaces. \u2022 No fuel storage. \u2022 No tuneup or oil change. Cons \u2022 Power output is not consistent; depends on battery charge. \u2022 Operator senses mowing resistance, which increases as charge decreases. \u2022 Enough power only for narrow spectrum of mowing conditions. \u2022 Unsuited to rough mowing conditions; optimal performance realized on reasonably smooth ground (best suited to small manicured lawns). \u2022 Cut quality, bagging, and mulching decline as battery loses charge.  \u2022 Battery stores enough energy for comparatively slow drive system. "^^<http://www.w3.org/2001/XMLSchema#string>
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