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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)
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.
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 !
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.
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.
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
Back Pack Blower (awesome)
Updated mower next year with self-propel option
Just some guesses.
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.
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!
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!
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
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.
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.
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.
With a couple of the 7.5Ah packs, you could effectively mow up to an acre at once. Nice.
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:
...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! :-)
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.
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.
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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