[Shop-talk] Electric String Trimmers

[Jimmie Mayfield]

It's probably better to compare watt-hours rather than amp-hours since 
battery voltages vary.  The Ego 5ah @ 56V battery has 280 watt-hours of 
power.  The 12ah Dewalt Flexvolt battery (12ah in 20V mode, 4ah in 60V 
mode) has 240 watt-hours of power.  So the 5ah Ego battery is a little 
bigger.  Dewalt does offer a 7.5ah battery but it's in their 40V lineup 
(300 watt-hours) that's geared towards landscapers.  It's kind of a 
shame that Dewalt had to bifurcate their batteries like that.  They 
could have just made their landscaper-pro tools use the same 60V 
Flexvolt battery...

Ego also offers a 7.5ah battery but it's heavy and expensive (cheapest 
way to buy one is to buy a mower with the battery, keep the battery and 
sell the bare mower on Ebay).  They also has a 28ah backpack kind of 
like the Stihl and Husqvarna backpacks but it's aimed at landscapers 
(and priced as such).



On 8/20/19 6:38 PM, John Innis via Shop-talk wrote:
> I have not used the EGO stuff, but if 5ah is the biggest battery they 
> have, I would not expect much out of them. The smallest battery I have 
> for my Dewalt stuff is 6ah, and I only use that one on the drill and 
> impact driver.  I have a 12ah battery for my string trimmer, and on 
> high mode it has as much torque as my straight shaft echo SRM-2100.  I 
> also have the Dewalt chain saw, and I have been very impressed with 
> it.  I used it to cut down, limb and buck a 25' tree about 8" in 
> diameter. WIth the 12ah battery it did the job without any struggling 
> and even had about 60% capacity when done.
>
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