For large yards where corded trimmers aren't practical, the battery-operated Black & Decker NHT518 is a reliable, lightweight choice. However, users recommend having an extra battery on hand to ensure the whole job can be completed in one go.
Cuts well and is ultra-portable. Reviewers praise the overall trimming ability of the Black & Decker NHT518. Some Amazon users even say the trimmer exceeds the manufacturer's claims regarding the diameter of twigs that can be cut. One such user says, "It states it can cut branches 3/4 inch, and it is true. With enough tenacity, you can cut up to 1 inch branches." However, not everyone is pleased with the battery. The most satisfied owners are those who use other 18-volt Black & Decker products as they find the interchanging batteries convenient and quick to change.
Great for short jobs. Most users say the Black & Decker NHT518 is easy to use. The unit's light weight makes it possible to trim the tops of hedges with only one hand, users say. However, having to charge the battery in the middle of a long job can interrupt workflow and prolong otherwise quick projects. A single charge will last longer for light work than for heavy trimming, but most reviewers say battery life lasts less than 30 minutes of standard use.
The locking power trigger adds an element of safety. When the button is employed, the machine cannot start, thus reducing the risk of unintentional cutting. The built-in hand guard is effective, as YouTube user "SunBaskingMan" demonstrates in his video review.
Electric quiet. Users find the battery-powered Black & Decker NHT518 much quieter than gas hedge trimmers. "It is silent and powerful," one Amazon shopper says. "You can get a lot of work done without worrying about disturbing your neighbors." Because it is battery powered, it vibrates less than gas trimmers, too. "I love the low vibration," one Amazon user says. Another quips, "After trimming with this cordless, even without earplugs, I could still hear." Although some reviewers state they feel comfortable using the hedge trimmer without covering their ears, manufacturers recommend always using eye and ear protection while using power tools of any sort.
In about 100 reviews, Amazon users report that the NHT518 is a reliable trimmer that's easy to use. Users appreciate the interchangeability of the battery with other 18-volt Black & Decker products.
Review: Black & Decker NHT518 18-Volt 22-Inch Cordless Electric Hedge Trimmer, Contributors of Amazon.com, As of June 2013
Users mostly praise the Black & Decker NHT518 in 20 reviews on Buzzillions.com. They like the model's ease of use and performance, but complain battery life is too short for finishing large gardening jobs.
Review: Black & Decker 18 Volt 22" Cordless Dual-Action HEDGEHOG Hedge Trimmer-NHT518, Contributors to Buzzillions.com, As of June 2013
This reviewer highlights his Black & Decker NHT518 hedge trimmer's best features in this video review. The interchangeability of batteries with other 18-volt products is one of his favorite features. He says he can cut about 1-inch wide branches without slowing down or getting stuck.
Review: Black and Decker NHT518 18-Volt Cordless Electric Hedge Trimmer Review, "SunBaskingMan", December 11, 2011
Reviewer Tony Lee Glenn demonstrates how easily the battery attaches to his NHT518 trimmer. He says the battery lasts for about one hour, but because his own yard is very large, he usually needs two batteries to finish it.
Review: Black and Decker 22 Inch Electric Hedge Trimmer Review, Tony Lee Glenn, May 23, 2013
Ten Lowes.com customers give the Black & Decker NHT518 an average rating of 4.4 out of 5 stars. The most common complaint is the short battery life.
Review: BLACK & DECKER 18-Volt, 22-in Dual Cordless Hedge Trimmer, Contributors to Lowes.com, As of June 2013
This reviewer lists pros and cons about the NHT518. He points out that the blade is long enough for most homeowners' yard work, it is lightweight, and doesn't vibrate much. The drawbacks he mentions are short battery life and lack of power when compared to corded trimmers.
Review: Black & Decker NHT518 Cordless Electric Hedge Trimmer Review, "Stan", June 3, 2013