First yard cut of the season --- DONE!!
(although it DID take a little longer than usual...)
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Speaking about lawn work...
I've been looking at ( ie pre-shopping ) some of the newer stronger cordless string trimmers they have out now.
My corded trimmer is now a couple of years old ( or more ) and will likely give it up before much longer. It also uses the thin 0.065" line that breaks way too often, in fact that is the only real complaint I have with it besides being tied to a cord. I'm also on a smaller suburban lot, so a gas trimmer would be overkill not to mention having to mix the fuel/oil and the noise they make.
Dewalt has a 20v ( as well as a 40v that I'm not looking at ) lithium-ion model with a brushless motor that I'm interesting in most. It has a 5ah battery that can work for about 30 minutes on high and about an hour on low speed, uses dual 0.080" line and it weighs in at 8.5lbs. Another feature I like is that it has a bump feed instead of an automatic feed, so I can control when new line is feed out instead of it controlling it for me. All of the video
reviews I've seen are very positive. Many have said that it feels like a commercial quality unit even though it's in the higher home level market.
I've also been considering a Ryobi 40v that also has dual 0.080" line and bump feed ( they have several 40v models, some single line and some auto feed ). The main advantage I see with it is with how you reload the line... The batteries are at a similar price as Dewalts 20v batteries, so that's another advantage it brings. It's downside that I see is when cutting down tall ( 2-3ft ) weeds, they often get tangled onto the head much more than I've seen with the Dewalt brand during the reviews.
Either one should be good to trim an acre or less on a single battery. Dewalt has several ( 50+ ) other cordless tools that use their 20v batteries including a really nice blower that I'd consider at some point. The Ryobi trimmer is part of their "Expand it" line, so has other attachment heads you can use with it. It also has a 40v blower as well as a 40v lawn mower that uses the same battery. In fact, the downside on the Ryobi ( the tall grasses issue ) wouldn't be an issue for me since I seldom ever get grass that tall even in the corners I may miss from time to time... and the other 40v tools, mostly the lawn mower are certainly compelling enough to consider. IN fact, in one video review... a guy trimmed, then mowed and finally blew clear his front lawn all with one single battery, granted it wasn't a large front lawn.