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Greenworks 40V 17" String Trimmer, 8.0 Ah Kit vs Greenworks 80V 16" Brushless String Trimmer

Two of the cordless string trimmers in our best cordless string trimmers: greenworks & ryobi compared comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.

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#1 of 14 in Cordless String Trimmers

Greenworks 40V 17" String Trimmer, 8.0 Ah Kit

8.3/10

Best for: Longest runtime here: 80 min on an 8 Ah battery

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#3 of 14 in Cordless String Trimmers

Greenworks 80V 16" Brushless String Trimmer

6.8/10

Best for: 65 min runtime from a 2 Ah 80V battery

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Spec-by-spec comparison

Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.

SpecGreenworks 40V 17" String Trimmer, 8.0 Ah KitGreenworks 80V 16" Brushless String TrimmerWeight
Cutting swathThe widest cutting path the maker lists (the number in most product names). Where the swath is adjustable, we rank the widest setting. 17 in 16 in 25%
RuntimeThe maker's longest runtime claim with the kit battery, usually at low speed. 80 min 65 min 25%
Kit battery energyBattery energy in watt-hours, computed as volts x amp-hours of the battery or batteries the maker says come in the kit (for example 40 V x 6 Ah x 2 = 480 Wh). Bigger batteries generally mean more work per charge from the same tool. 320 Wh 160 Wh 20%
Listed weightThe weight the maker lists. Lighter trimmers tire your arms less. Makers don't always say whether it includes the battery. 7.1 lb 7.97 lb 20%
Brushless motorYes when the maker lists a brushless motor, which generally runs cooler and longer per charge than a brushed one. No Yes 10%
Kit battery40 V 8 Ah = 320 Wh (computed)80 V 2 Ah = 160 Wh (computed)info
YardPick score8.3/106.8/10100%

Where each one comes out ahead

Greenworks 40V 17" String Trimmer, 8.0 Ah Kit

Better published figure on: Cutting swath, Runtime, Kit battery energy, Listed weight.

What we like

  • Top runtime in this comparison (80 min)
  • Top kit battery energy in this comparison (320 Wh)

Watch out for

    Greenworks 80V 16" Brushless String Trimmer

    Better published figure on: Brushless motor.

    What we like

      Watch out for

        Verdict

        On published specs, the Greenworks 40V 17" String Trimmer, 8.0 Ah Kit scores higher (8.3 vs 6.8). Specs don't capture sound character or feel, so weigh the pros and cons above too.

        • Choose the Greenworks 40V 17" String Trimmer, 8.0 Ah Kit if this sounds like you: longest runtime here: 80 min on an 8 Ah battery.
        • Choose the Greenworks 80V 16" Brushless String Trimmer if this sounds like you: 65 min runtime from a 2 Ah 80V battery.
        Greenworks 40V 17" String Trimmer, 8.0 Ah Kit on AmazonGreenworks 80V 16" Brushless String Trimmer on Amazon
        Spec sources

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