Greenworks 21602

Model: Greenworks 21602 20-Volt Lithium Ion 12-Inch Cordless Electric String Trimmer/Edger

Eco-friendly build, with lithium ion battery for clean, zero-emission operation
Has trimmer/edger capabilities and a 12-inch cutting swath
Lightweight; perfect for trimming and garden grooming tasks at home
Electric design allows for quiet operation

Price range
$140 to $160

Our view

greenworks 21602 trimmetPros

  • Zero-emission performance, but still very efficient with a 12-inch cutting swath
  • Converting to edge trimmer is no sweat with dedicated switch
  • Adjustable shaft makes using a breeze
  • Very light composition; causes little stress to the back when used
  • Lithium ion battery offers no risk to health
  • Energy-efficient charger certified by the EPA


  • Price is slightly above market average
  • Cordless feature offers limited operation time
  • Air vents can get clogged or blocked at times by grass clippings
  • Long strings of grass can get trapped in drive shaft

Taking everything into consideration, the pros of the Greenworks 21602 outweigh the cons. It is an efficient, compact tool that can do the job day in, day out. While the price may be a concern for others, the performance of the device more than makes up for it. Knowing that you are not harming the environment while using it is a notable benefit too.

Our rating
4.6 stars

Alternative lawn mowers in same price range
Other options that are around the same price are the Black & Decker 20-Volt Lithium-Ion Trimmer/Edger and the WORX WG165 10-Inch 24-Volt Lithium Ion Cordless Electric String Trimmer/Edger

The cordless design of the Greenworks 21602 makes trimming an easy task. You will never have to be burdened by the power cord getting tangled up in some bush or around some tree. The 20 volt, 6 Ah lithium ion battery provides approximately 45 minutes of use per charge, and on occasion, even more. That rate is approximately three times longer than the average duration of nickel cadmium batteries. It is very light and durable, able to last up to 2,000 cycles. It also provides consistent power on a regular basis, so there is no need to worry about intermittent power lapses or surges. And because lithium ion batteries are not made of heavy metals, there is no concern for health risks when disposed. Additionally, the battery is compatible for use in other products such as the Greenworks Blower.

Using the trimmer is also very easy. With the simple push of a button, the device converts from trimmer to edger in an instant. With this feature, it will be easy to switch from trimming to edging when working on different areas. The Greenworks 21602  also earned the Energy Star rating from the Environmental Protection Agency, so you can rest assured that using this device has very little impact on the environment.

This trimmer is also equipped with an adjustable telescoping shaft. The shaft automatically adjusts itself according to the height if the user. This minimizes the stress on your spinal cord and makes trimming an overall easier task. The automatic line advancement system also prevents waste by only refilling worn line when needed.


  • 20 volt lithium ion battery that provides clean, efficient power
  • Single switch control for trimming and edging mode
  • Auto line advancement system
  • Adjustable telescoping shaft
  • 4-year parts and labor warranty for the trimmer
  • 1-year warranty for the battery
  • Lightweight design at 7.5 pounds (approx. 3.4 kilograms)

Drive system: Cordless and electric drive system, which delivers eco-friendly performance
Cut width: 12”
Handle style: Front positioned-handle style for easy handling and control
Power source: 20 volt, 6 Ah lithium ion battery
Warranty: 4-year parts and labor


I'm the kind of guy who likes to spend his time outdoors. If I'm not in my back yard, I will be fishing, camping or hiking.


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