What is the life expectancy of the battery in the Ego mower/ When does it need to be replaced?

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This conversation has been merged. Please reference the main conversation: what is the predicted life of the battery?

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Robert Bigras

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Posted 5 years ago

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Blue Angel, Champion

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Most lithium cells are good for between 500-1000 charge/discharge cycles. BUT, that all depends on how the cells are treated, the depth of discharge, storage temperature, temperature under load, and a bunch of other factors.

If you cut your lawn once a week:

12 months/year = 10 years
6 months/year = 20 years

Granted, those are rough and optimistic figures at best... the reality is likely somewhere in between those numbers and 50%. Lithium cells lose capacity with time, so time to replacement will vary depending on your individual needs, as in whether the reduced capacity is enough to complete the task.

Considering the extensive thermal management built into the Ego packs/chargers, I would expect them to fare much better than their competition who have very little thermal Engineering.

To answer your question, nobody knows. :-)
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Purchased at HD, box says ST1201, Weed Trimmer says ST1200. 56 volt. It uses a string roll type. I've used and charged about 10 times.  The first time I laughed when it died less than 15 minutes, a 10x10 space but I have charged and used about 10 times now and always the same result. I have 20 acres to weed wack, after having used Ryobi 18v trimmer first, I was so excited when I saw "56 volt!" 
I PRESUME the battery is defective since the Ryobi 18volt goes and goes and goes, I would say 4 times what the EGO 56volt is doing...which is pretty funny considering the power difference.  I'm weed wacking WEEDS, it's a 12".
   When I did decide to purchase HD had 3 boxes, none seemed to have a factory seal on the box, the clerk told me the company, EGO, doesn't have that.  When I opened the box all seemed original except I did note the battery bag did not seem to be sealed like a manufacturer would have, there was no tape, just a clear bag over the battery, open ended.  I have provided EGO the serial numbers, perhaps someone switched them out at store level, I don't know, but if they had a factory seal or reps checking their products, an HD should not have their shelf full of only 3 boxes and ALL not sealed.  I am assuming it's defective, no one would sell a weed trimmer touting an amazing 56v of power "like a gas motor"( the box says), that can't compare to it's competitions 18 volt.
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David Cline

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Yeah, that run time is well short of what it should be. I can get at least 15 and usually 20 minutes of run time when I use my 2ah battery in the mower. In my 15" trimmer it runs for half an hour.

Ego's customer service is awesome and will no doubt get you fixed up with a new one in no time. In fact, if you included a phone number when you registered your equipment, they may call you before you have a chance to call them!

I think you'd need more than 20 batteries and that wouldn't even be enough if you're doing 20 acres!  Is that just a 10 x 10 block of solid weeds within those 20 acres, or are you trimming around the perimeter?  How tall are they?  Maybe might want to try the 15" version, since you've got 20 acres to use your string trimmer on.  

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Its not a one day project, it is a continual year round chore.  Did you think I was expecting to do 20 acres non-stop?
When it comes to "what am I cutting", it only takes a few tries to figure out when the EGO feels over taxed!  It whines down to about 10% power (thus too slow to cut much more then a blade of grass for about 30 seconds) and then WHINES up to full bore...it's very annoying so you learn to be gentle and not overtax it.  The string that came in the box was a joke!  I can take it in my hands and break it, this was an immediate sign the manufacturer (EGO) had little faith in its trimmers abilities!  I quickly went to the Manual to see it's string recommendations... maximum .08 ?  Wow they really covered their buns with that!  Who wants a 56volt full sized weed trimmer with a string that can only cut grass blades, a 54 yr old woman can break the string it came with in her bare hands!  I have been using .09 in the 18 volt Ryobi for 100's of HOURS and zero problems!    I put that in the EGO and it did that whining down and I smelt burning from the trimming head!  This happened way after the problem of 15 minutes, so do not go there.  I went back to the smaller string and it works exactly as it did the first time I used it.  On second use (30 minutes) the silver pieces for stringing the string through, fell out and just lucky I found them and must always be careful not to loose them when changing string.  I would guess these are lost by many people and perhaps throw some extras into the box for when it happens to new users who are not expecting this.

Also, when I played with this in the store, one of the things I was also happy with was that there was a button to release the battery making it easy to remove.  I have some DeWalt cordless tools that I can barely manage to get the batteries out and hurt my joints, I have to use 2 hands and 2 legs to change DeWalt batteries.  Saddly this EGO release lever broke on about the 5th cycle so now I'm fighting with this thing trying to get the battery on and off.

Another issue, the Ryobi design cuts right down to nearly the dirt for a very clean result and offers a nice flat bottom you can be a bit lazy at times and let it ride on surface thus resting your arms, the EGO design does not cut low (probably because the lower area is tougher and it over taxes it, lol).  In order to cut low requires tilting it thus you can't let it ride on the bottom, you must constantly have it raised, suspended, and it did not come with a strap though the EGO handle nicely accommodates this angled grip.

Ego is touting being a "gas like trimmer", lots of guts, but the trimmer I have, defective or not, is just not what it is presented to be.  Why does the little Ryobi 18 volt out perform it?  It's like putting a Porsche engine in a VW bug.  I had a Stihl for 15 years and it only died when the wrong gas was accidentally put in it.

The manual mentions not to have the battery in moisture, so I keep it INSIDE my truck, not in the back like all OTHER gardening tools, I keep the charger inside as suggested though not convenient for a gardening tool, BUT I just read the manual and noticed it mentioned not exceeding 106 degrees!  Excuse me?  Not only am I putting a dirty weed trimmer "inside" my car to baby the battery, and I throw a towel or my jacket over the battery to help keep it out of the sun coming through the windows....but if its 100 degrees outside or even 90, the inside of the truck, any vehicle near the equator, the temp is going to be way over 106 degrees!  I guess China is a really cold place.  So what...am I suppose to get a cooler to keep the battery in, freeze the blueice every night too?  Oh no, that wont work, now that would violate the moisture caveat.  Is this a violin or a weed wacker?  Cant help but feel the "string that breaks in your hands, not to exceed .08", the "no moisture", "keep inside", "Max 106 degrees" are all preplanned warranty violations.

In all fairness, I must say I LOVE several features of the EGO which is why I am hoping the battery is just defective and EGO kindly sends me a new one since I'm sure not going to spend nearly $100 to find out this is just how it works. 

The weight and balance, ergonomics, are exceptional and that's coming from a 110 lb old lady!  I have a lot of wrist, thumb joint and upper back issues with the Ryobi, nearly no joint issues with the EGO and it has a great reach, ideal reach, though the endless suspension with no strap constantly taxes your outer shoulder.

The sound of the trimmer head is AMAZING, like driving a Rolls.  Too bad it's more like a Tonka toy, nothing under the hood.

When...WHEN working at full Power... it's SPEED (coupled with squared string), allows it to cut threw tougher items than the Ryobi 18 volt.  It can NOT cut down large Mustard Weed stalks, as the Stihl can, but medium stalks, less than 1/2", it can cut...one at a time so you have to be very careful when approaching tough weeds.  Honestly, on occasion it is at FULL speed, it works beautifully, just need the speed all the time and at least 25 min of run time, this 10-15 min maximum battery is just not usable. At nearly $100 I would have to have a lot more confidence in the overall machine to invest in buying extra batteries.  The Ryobi have purchased extra batteries because it's already lasted 100's of hours and I'm totally confident that it will have a long life and if it dies I would buy another and use the extra batteries on the new one.  I currently have no confidence in the EGO product.

Please keep in mind that my negative experience, I believe, hope, is due to a defective battery.  I have not written my review to Home Depot yet, or Amazon etc comparing to Ryobi, waiting to see how this goes.
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Ken, Champion

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I don't get why you'd buy a light duty trimmer if you have 20 acres to take care of.
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Denise C

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Hi Virginia, we want to thank for taking the time to write such a thorough review of our string trimmer. We also received your email. We hope the resolution we offered you via email is satisfactory; and then in the future, please feel free to contact us on the phone for a faster resolution. We would have easily and happily taken care of this situation within a matter of minutes, instead of you having to wait for a response here. 
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Julio Villanueva

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Warranty on their batteries are good for 3 years. So at least we know they should last longer than that ☺

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