If you are sold on the power and portability of a gas-powered string trimmer, but don't want to deal with the fumes or fuel, Black & Decker's Grasshog NST2018 18-volt rechargeable trimmer is a high-powered option. A nearly hassle-free tool, this model is an excellent choice for trimming moderate-sized yards of around one-half acre or less.

A powerful motor runs the Black & Decker NST2018, and the generous cutting width -- 12 inches -- is among the widest on the market, which is a nice time-saver since the wider the swath, the less time you will need to spend plowing through tall grass or weeds. This model also easily transforms into an edger, letting you slice a manicured edge against sidewalks, patios or driveways. You just press a button, twist the head 180 degrees and run the flip-down edge guide along the ground.

While most cordless and electric string trimmers use a bump-and-feed system to release more line when necessary, the Black & Decker NST2018 18-volt rechargeable trimmer features a much more user-friendly automatic-feed spool. It senses when more string is needed, then uses centrifugal force to automatically release it -- no need to stop and tap the trimming head on the ground to get more line.

The 18-volt battery pops easily on or off the handle, and recharges on the included charger in between three and six hours. An extra-nice feature is that this model comes with two batteries, so you can always keep one charging, and zip through twice as many trimming tasks as you'd be able to tackle with just a single battery. The batteries are also interchangeable with Black and Decker's other 18-volt tools, including a hedge trimmer, chain saw, pruning saw and blower.

At just 7 pounds, the Black & Decker NST2018 18-volt rechargeable trimmer is lightweight, adjustable to accommodate users of various heights and is covered by a 2-year warranty.


Pros: Lightweight, versatile, automatic-feed spool, wide cutting swath
Cons: Designed for moderate-sized yards or smaller

Warranty
2 years