LM2102SP or LM2142SP

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I am looking at both the LM2102SP and LM2142SP models.  The LM2102SP  comes with a 7.5Ah battery and the LM2142SP comes with two 5.0Ah batteries.   I have a small yard, and so the extra mowing time afforded by the dual battery model is not something I really need.  And so my question is about the relative mowing power of the two models.  All else being equal, one 7.5Ah battery should deliver more power than one 5.0Ah battery, right?  Does the dual battery LM2142SP (which is brushless) simply allow you to mow longer than the single battery LM2102SP (brushed)?  Or is the dual battery model able to use both 5.0Ah batteries at the same time to deliver more power than a single 7.5Ah battery?  I'm worried that if the extra battery is just to increase mowing time, not mowing power, that the LM2142SP will be less powerful than the LM2102SP.  But the dual is brushless whereas the other one is not, and I don't know how much difference that makes.  As the dual model is quite a lot more expensive, I'd like to know whether or not it is at least as powerful as the single battery model before deciding to buy it.
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Christopher Harrop

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Posted 4 months ago

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szwoopp, Champion

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Official Response
The Ego PeakPower technology combines the power of 2 EGO batteries for longer run time AND efficient power draw

The motor on the new dual battery mower is brushless and does provide more power in addition to more run time.  Per Ego engineering department

It has the most powerful brushless motor in the entire EGO mower line (1200W BL motor is much, much more powerful than the 1000W Brushed motor on the LM2100SP). With peak power tech (drain more current from the battery), these two combines generate much more torque than any EGO mower in the market and it actually is the most powerful cordless mower in the market now.
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Bill Menzel

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I have talked about this numerous times in the forum.  I have a dual battery and also a single battery.  There is no comparison.  The dual battery has more useful power and a lot more torque.  It never over heats and the batteries never over heat.  I have a lots of grades and now I can go faster and not worrying about the orange light turning on.  I also cut thick 31/2" Kentucky blue grass.  I use two 7.5 ah batteries.  You can use a 7.5 ah with a 5.0 ah if you want.
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summetj

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I have the original LM2102SP and have never needed more power than it has.  (I did upgrade to the high lift blade for $20 to get more "updraft")

Yes, sometimes if I'm cutting grass that I let grow for two weeks I may have to adjust the speed control down from full speed, but under all "normal" weekly mowing conditions it has plenty of power to cut at full speed. (And full speed is a very fast walk...)

I have had the self propel unit fail on it (replaced under warranty), so perhaps the LM2142SP model has a more robust self propel unit, and it does have more batteries and a stronger "brushless" blade motor, but given the cost, and the fact you have a small lawn, I'd recommend saving the money and getting the LM2102SP.
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Bill Menzel

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Does anyone besides myself on this forum have an Ego dual battery lawn mower (LM2142SP)? 
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Christopher Harrop

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Thank you for the helpful responses.  Aside from the issue of power, I much prefer a brushless motor vs a brushed one.  It's clear to me now that I want the dual battery model.  Now I just have to decide whether the extra cost is worth it to me personally.  
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Bill Menzel

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If you can afford it, it would be worth it in the long run.  It doesn't have to work as hard as the single battery lawn mower.  It should last a lot longer due to the power and brushless motor.  Whatever you decide, good luck.
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Ken

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I am considering the same items due to my need, except other than the dual battery I have purchased the steel deck which apparently has the same motor as the dual battery model (the newer brushless design).  I wish there were more specs.  If you take what the official response:

"The Ego PeakPower technology combines the power of 2 EGO batteries for longer run time AND efficient power draw. The motor on the new dual battery mower is brushless and does provide more power in addition to more run time.  Per Ego engineering department"
 
It states AND efficient power draw which states it is more efficient, not necessarily more powerful.  the second part is just stating that the new brushless motor is more powerful, which I understand is true over the prior motor rating of the non brushless motor and not necessarily running "more powerful" due to the dual batteries.  

If it doubled the current then run times would not be longer per se.  Details and specs on this issue would surely help in making a decision based on facts.    
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Bill Menzel

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I think no matter what I say, your trying to convince yourself that the single battery motor has the same torque and power.  Believe me it doesn't,  I have both and can compare the two.  It is a big difference.  I sent you the youtube video on this lawn mower.  If you don't believe me or the youtube video there is probably nothing anybody can tell you to convince you.  I guess what I am telling you are not facts!!!!.  It looks like I am the only owner on this site that has this two battery lawn mower.  That's too bad.  At least Ego can get rid of their stock of single battery lawn mowers.  On Sunday I mowed our lawn (860sq. feet).  I have thick Kentucky blue grass and cut it at 31/2 inches.  Our lawn has may different grades.  I now can run our lawn mower at a higher speed and it never over heats. I finished in less that an hour and charged the batteries on two different rapid chargers.  Both batteries charged in 15 minutes which shows me that they are both being used at the same time (more efficient draw of current). I use two 7.5ah batteries which is probably an overkill.  Do you really think that Ego is going to tell you that the dual battery lawn mower is a lot better that the one you bought.  I don't think so.  I have a 2018 M550 BMW which is a v8 with twin turbo chargers.  The BMW 540i has a single turbo.  Due you think they have the same power and torque. 
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Max Nguyen

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It also looks like you're the only one that has both to compare.   Would you say that the new dual battery mulches better  and leaves less clumped grass?  Also less uncut grass here and there?   
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IMOW

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The steel deck self propelled is a brushless motor 1000w the dual battery has the brushless 1200w motor. The dual battery motor is the strongest motor in line up. (I have a single battery mower)
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Ken

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I am by no means calling you a liar or discounting what you are saying, in fact, I am thankful that someone has some information on the topic. All I am looking for as a consumer would be info available like the example you mention. If I’m buying a BMW, BMW does post HP and torque numbers so the buyer can make a decision in both feel and fact when making a purchase, that’s all.

One is not necessarily better than the other, it’s more important that it fits your need. I personally would like to know if there is a substantial “power” difference per specs between the same motors but dual vs single battery and then I the consumer, can make a decision.

Sorry if it affended you, that was not my intent. I think EGO has the best product out there from what I have read but I’m just trying to understand what I am buying and what fits my need the best.
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szwoopp, Champion

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Ken have you watched this video
https://www.youtube.com/watch?v=Kd85zB-59Wo



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Bill Menzel

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New Dual Battery Mower - This NEW Dual Battery EGO 21" Self-Propelled mower provides longer run time not only because it has multiple batteries!  This the EGO's first BRUSHLESS lawn mower.  You will not see the word brushless on this lawnmower but rest assured it is.   This lawn mower operated very similar to the dual battery snow blower with what EGO calls PeakPower technology.  Basically, the PeakPower technology can determine what battery or batteries (It can run off a single battery) you have in the lawn mower and the software determines the most efficient power draw.  This allows users to use multiple batteries for long runtimes and more torque or the ability to run one battery while the other charges.  While this new model looks and feels almost exactly like the single battery 21" lawn mower, the difference lies in the motor and the torque it can provide.  With two 5.0Ah batteries, one can see upwards of 40% more torque from this unit.  that allows you to run some of the upgrades we list below with little effect on runtime!

This is an expensive unit, due mostly to the cost of the two batteries if you buy the kit.  But if you are wanting a nice, powerful and quiet lawn mower to tackle larger lawns, look no further, this is it.

What is PeakPower Technology?
This new mower is the second tool from EGO that will run on a single battery or also capable of running off two batteries.  EGO calls this technology PeakPower and it is software that is capable of detecting the size of the batteries in the tool.  Obviously, the larger the battery, or batteries, the better it will perform.  The software will look at the number of cells (battery pack size) that is can pull power from and adjust the amps drawn from the battery, or batteries for optimal performance.  This gives the user options if a battery was forgotten to be charged or if one were to possibly go bad.  We found that there is little difference between running the unit with a 7.5Ah single battery or two 5.0Ah batteries, but all of our testing was done with the two 5.0Ah batteries that came in the kit.

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szwoopp, Champion

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Other than the statement that this is Ego's first brushless mower, everything else is accurate.  Previously the steel deck mowers had brushless motors. 

This is Egos first composite deck mower with a brushless motor would be the accurate statement about this mower and its motor.
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Bill Menzel

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I just copied a pasted the narrative under the video.
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szwoopp, Champion

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Understood William.  I knew that was not your commentary.
I posted the same correction in the video comments on the you tube page.
As everyone is looking for accurate info on this new mower I thought it might be helpful and avoid confusion.