New battery sizes?

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My 15 inch string trimmer just arrived!  To bad its raining!

Anyway I noticed on the battery manual they list some new sizes.   What could be the uses.

2.5 Ah.  Possible replacement for 2.0 Ah.  Same weight, maybe standard on new sales.
5.0 Ah   Guessing this would fit current mower  Does show same weight as 4Ah also hmmm
7.5 Ah   Mower maybe or something bigger coming down the line (edger, snow blower)
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Doug

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Posted 5 years ago

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Blue Angel, Champion

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Great info!

I always suspected the extra space in the mower's battery compartment was for a larger pack with three parallel strings of cells, the current 4Ah has two strings.

Nice!
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Jack

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Hey D,
My 15" trimmer is about three months old.  I got one from Home Depot online and shipped to my house.  It is beyond doubt the BEST string trimmer I have ever used.  That starts back with the old "weed eater". The only thing that makes noise is the string going around.  You will love yours.
If they are going to make some new products with the new batteries, Make a CULTIVATOR and CHIPPER SHREDDER !
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Doug

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Would a 7.5Ah battery even fit in the mower?  I am guessing the 5Ah is about the same size as current 4 since the manual has it at same weight 4.87lb.  The 7.5ah battery is 6.31lb.

In case anyone is wondering the 2 and 2.5 both say 2.77lb.

The manual doesn't list the actual size of the batteries.
(Edited)
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Blue Angel, Champion

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If you look at the trend in cordless tool batteries all manufacturers have released four and five amp hour batteries lately. These high-capacity batteries all measure the same in dimension and weight to the previous three amp hour batteries. The 18 650 cells they are based on have simply gained capacity, the packs use the same number of cells and cells are the same size and weight.

In the case of the ego 7.5 amp hour battery they will be using 2.5 amp hour cells instead of 2.0 amp hour cells. They will then use three parallel strings of 14 cells instead of two parallel strings of 14 cells like the current four amp hour battery uses.

I've looked at the extra space in the mower's battery compartment and wondered exactly when they were going to release either a six amp hour battery or a 7.5 amp hour battery.
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Jacob

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Well. Less walking back to my shed to change my battery. But it times perfectly with needing something to drink. Perhaps a larger drink will fix this problem for me. Bring on the bigger batteries!!!!
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Blue Angel, Champion

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Or bring on the cup holder(s)... the dawn of Ego branded mower accessories! :-)
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SCDC, Champion

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Blue, amazing marketing idea, cheap too.
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Jennifer VandeWater, Community Manager

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Michael, once you get your hat, we'd love to see some "selfies"!  We look forward to it! 
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Blue Angel, Champion

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Nice! Get em started young!

With any luck they'll grow up not knowing of gas powered yard equipment!
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SCDC, Champion

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I think kids of that age have an interesting future.  Robotics, automation, but fossil fuels will still be the cheapest route for many things.  Engines burn pretty clean now.  I remember back in the 70's, we had acid rain that would ruin car paint.  You could see the etching if you didn't wash your car often.  Rain water is pretty clean now, and the air quality in most of the USA is fantastic.  I think we are in a pretty good place. 

A new battery technology will come along and change a lot of things.  Also, when solar hits the >40% efficiency at a good cost/value, then we'll start seeing more of it with homes.  Right now the technologies just aren't there.

We are at the dawn of this new generation.

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SCDC, Champion

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It certainly does mention the larger battery capacity, and it would fit in the mower without a problem.  This could be a game changer for those of us who have to change with 5 minutes of cutting left!  I see this as a precursor to higher drain devices like:

  • Walk behind Edger

  • Snow Blower

  • Shop Vacuum

  • Back Pack Blower (awesome)

  • Updated mower next year with self-propel option

Just some guesses.

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Doug

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For me I don't think the 7.5 would cut it.   It takes almost two full charges to cut my lawn.  Running form full charge to red light first turns on first phase.  Have just a little bit left over on second phase finishing up the back yard.  Once or twice last year the red light did come on second part of yard.  Was able to complete cutting it however.

Guess I could continue with my half hour break or purchase a 5 to complete yard with out stopping to recharge.  7.5 might just cost way to much.
(Edited)
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SCDC, Champion

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Cost will certainly be higher, but I don't know by how much.  I do think it would allow EGO more options though, including those things mentioned above.  You must have a very thick grass, or very large lawn!

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Blue Angel, Champion

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A big note to Ego: It is time to start rating your battery packs in Watt-Hours!!!

The salespeople at Home Depot are clueless and won't explain this for you... Ego's marketing needs to get agressive and call out how much CAPACITY is in the batteries! To the uninformed shopper (which describes most), a battery is a battery, and the Ryobi comes with two of them.

If Ego is planning to launch a 7.5Ah pack they need the marketing behind it.

Other brands have limited themselves on their battery's physical size, where the pack fits tightly into a slot. The only tool in the Ego lineup that does this is the mower, and they've cleverly left room for expansion. This could be the turning point for those larger properties, since the other tool brands can only increase the power density of the cells in their packs, they have no expansion room to add more cells.

Ego, it's time to kick your marketing team into HIGH gear!
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Chris Atkins

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 ALL batteries are rated in Ah or mAh. Good example is standard AA rechargable batteries.. 2300mAh.
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Blue Angel, Champion

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Battery cells are typically rated in Ah/mAh, battery packs are typically rated in Watt-Hours (Wh). Once assembled into packs of various voltages, the Ah capacity of individual cells is meaningless to the consumer.

If you look at the restrictions for carrying Li-Ion packs on airplanes, they are using the Wh as the determining unit of total pack energy capacity. For example, a four cell pack could be rated as 14.4V/3Ah, 7.2V/6Ah, or 3.6V/12Ah. All four packs use the same four cells, and all four packs have the same 43.2Wh energy capacity despite having very different Ah ratings.
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Doug

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Lawn is about 1/3 acre.  Its a mess has some nearly bare spots with sections of almost carpet thickness grass.  Usually cut lawn on highest mower setting.

Maybe 1 to 1.3  hours to completely cut lawn.  Battery seems to get close to 35 to 40 minutes before red light comes on.  This was on the few times I remembered to time it
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SCDC, Champion

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Those dense packs of grass, where you have to slow down because the mower red lights you, will drain a battery fast.  I see your point.
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SCDC, Champion

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Blue, I'm with you on that point about marketing.

I wonder how big of a marketing budget they have?  Hard to say.  Ryobi is hitting it hard at HD.  Wouldn't hurt for EGO to look at their marketing plan.  The better EGO does, the better we all make out, since we are vested.  I preach the product, because I firmly believe it to be the best, and I want to see the product line grow.  I think limiting themselves to HD, who only favors the mighty dollar is a bit inhibiting. 

Amazon baby.  Hit it, and hit it hard.

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Agreed 100%
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Doug

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Thinking Ego can't offer items on Amazon due to the contract with HD.   Just a guess.
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SCDC, Champion

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As with all new companies, they often get bound by contracts that end up limiting their distribution.
(Edited)
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Jacob

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I agree that its important to rate batteries by watt hours. Expecially because ECHO just released a 58v line. And worx also released a 56v line. BOTH have an attachment capable trimmer. Hint Hint. I wish ego had an attachment capable model.
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The real joke with the echo line tools is they probably use the exact same battery cell layout as ego does, that is, groups of 14 cells in series.

They are probably basing their voltage on the peak pack voltage which is likely the same as the ego packs. This is taking the stunt that Dewalt pulled with their "20V" tools to another level of stupidity.

But since there's nobody regulating battery pack claims I guess everybody will just keep doing the same thing.

The honest companies are using 3.6 V per cell as a pack voltage multiplier. Ego is using 4 V per cell just like Dewalt, Ryobi and all the other yard tool companies with high-voltage systems, and who could blame them?

Now echo is claiming 58 volts which is probably as far as they could go... The charged pack voltage is probably 58 point something.

To the average uneducated consumer it would appear the echo system has a 2 V advantage, when in reality the packs will measure pretty much the same.
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Blue Angel, Champion

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The real dilemma comes when rating the packs in watt hours, since the watt hour calculation is simply voltage times capacity.


The calculation needs to use the average pack voltage during discharge in order to be accurate, but since everybody is leaning towards reporting peak voltage for their packs you can't legally do that.
(Edited)
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SCDC, Champion

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As you all know, the average consumer doesn't calculate anything.  They basically take the salesman's word.  Hey, that one has more Volts, it must be better.  It's simply the "Mine is bigger than yours" marketing trick, and it works.  EGO has to sell on not just the battery pack, but quality/warranty of product. 
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I would bet the 2.5Ah and 5.0Ah packs will eventually replace the 2.0Ah and 4.0Ah packs.

With a couple of the 7.5Ah packs, you could effectively mow up to an acre at once.  Nice.
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Since the charger is capable of charging the 2.0Ah in 25 min but can only charge the 4.0Ah in 30 min, I'm assuming the charger's power limit is reached while charging the 4.0Ah pack.  If this is the case and the other packs charging capabilities scale linearly with capacity, the following charge times should be close:

BA1120: 56V 2.0Ah: 25 min
BA1400: 56V 2.5Ah: 25 min
BA2240: 56V 4.0Ah: 30 min
BA2800: 56V 5.0Ah: 38 min
BA4200: 56V 7.5Ah: 57 min

The only one I'm not too sure about would be the BA1400 2.5Ah battery.  This will depend on whether the 2.5Ah cells can handle being charged at the same rate as the 2.0Ah.

A cell's maximum charge rating is based on its capacity, and is a multiplier.  Example (rough, for demonstration purposes only), a 2.0Ah cell charged at 2.0A for 1 hour would reach full charge, and the charge rate is 1C (1 x the cell's capacity).  If charging at 2C, the current would be increased to 4.0A and it would charge in 1/2 hour.  Likewise, if charging at 0.5C the current would drop to 1.0A and charging would take 2 hours.

These are rough average calculations.  In reality, the peak charging currents would be higher since lithium ion cells require "topping off" at a reduced current to achieve 100% charge.

For the 2.0Ah pack to charge in 25 min, it's taking about a 2.4C charge.  The higher capacity 2.5Ah cells would need to handle that same 2.4C charge rate to keep the same 25 min charge time.  Since higher capacity cells generally can't handle charging as fast as lower capacity cells, it wouldn't surprise me if the 2.5Ah pack took 30 min to charge.

Remember, the 4.0Ah pack uses two strings of cells wired in parallel so it can handle twice as much charging current as the 2.0Ah pack.  If the charger could pump out that much power it could probably charge in 25 min as well.  Maybe we'll see an Ego Supercharger that can punch more power into the higher capacity batteries of tomorrow?

Since Bosch has announced the availability of a 6.0Ah 18V battery pack in Europe:

http://toolguyd.com/bosch-18v-6ah-battery-fast-charger/

...it will only be a matter of time before these 3.0Ah 18650 cells find their way into pretty much everything, at which point we'll probably see 3.0Ah, 6.0Ah and 9.0Ah packs replace the upcoming 2.5Ah, 5.0Ah and 7.5Ah packs.  This won't be happening for a long time, so don't be worried about obsolescence quite yet! :-)
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This review of teh new 15" trimmer by Workshop Addict touches on what I was saying above regarding the physical size of the batteries and other brands limiting themselves by using tight fitting compartments to hold the packs in the tools:

https://www.youtube.com/watch?v=2nZqeUrRaxI

Ego will not be limited by physical size, and I wonder if this fellow got thinking about this after seeing the larger battery specs in the 15" trimmer manuals?  Probably.
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Jennifer VandeWater, Community Manager

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Congratulations on your new trimmer, Doug! As you’ve noticed, we are in the process of introducing additional battery options to our EGO lineup. All EGO batteries will continue to fit and power all EGO Power+ products: past, present and future. Not all new products will be immediately available in The Home Depot stores; look for them on www.homedepot.com.
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And look at all of your EGO products, none of them except the mower have a fit area for the battery.  Even the mower has a lot of spare room with the 4ah battery inserted.  This allows for the use of larger, or smaller batteries.  very well thought out design, does not lock you in.


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Blue Angel, Champion

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Ha, in a rare moment of clarity I was pretty close!  The updated manual for the fast charger has been posted:

As I pondered, the 2.5Ah BA1400 takes 30 min to charge instead of 25 min like the 2.0Ah BA1120.
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Jennifer VandeWater, Community Manager

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Hello everyone.  We have posted these new batteries on our website. Links are below for your convenience.  All of these batteries will be available on HomeDepot.com in the coming weeks.  Pricing and links to purchase them will be updated as soon as they are available.

http://egopowerplus.com/collections/accessories/products/56v-lithium-ion-2-5-amp-hour-battery
http://egopowerplus.com/collections/accessories/products/56v-lithium-ion-5-0-amp-hour-battery
http://egopowerplus.com/collections/accessories/products/56v-lithium-ion-7-5-amp-hour-battery
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SCDC, Champion

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Oh Why Jennifer.  That 7.5 has my name written on it.  Please sell it on Amazon. 

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