Shootout.....
Three inch screws the whole time does not make much sense to me for a test. All that really tells you is how many 3" screws you could drive.
For me, I do drive alot of 3" screws, but then I need to drive some 1 1/4" screws, some 1 3/4 screws, bore some 5/8" holes and maybe a couple 1 1/'4 holes. I might mess up and need to take some screws out. With the impact? Yes. This to me makes more sense as to how long that impact is gonna last me for the whole project. Going from little need for big power to big need for big power. I took off my truck what I usually have and use. Not every time of course but what I feel I use the most.
The test;
11 5/8" holes with bore bit
2 1 1/4" holes with bore bit
26 1 1/4" torx screws (driven and extracted)
64 1 3/4" torx screws (driven and extracted)
86 3" torx screws (driven and extracted)
No Resistance Run Time. NRRT ( For the misc)
DeWalt;
Ran the whole test with out a hitch. By the end of the run the DeWalt was almost too hot to touch.
NRRT, 2 minutes, 37 sec. The DeWalt pretty much dies all at once. Not much slowing down.
Makita:
No problems during the run. The Makita also was very warm but not as hot as the DeWalt.
NRRT, 13 minutes, 52 seconds. The Makita just kept going. I was very surprised at how much longer it kept going being that the DeWalt only got to 2 1/2 minutes. At 10 minutes I even drove a couple 3" screws to make sure it had usable power. It did but very shortly after it slowed dramatically. So actual usable power I would say right around 10 minutes or so.
Bosch;
The Bosch too was not phased by the test. Once again becoming quite warm yet being the coolest by far compared to the Makita and DeWalt.
NRRT, 15 minutes, 46 seconds. The longest no resistance run time after the main test. Once again I wanted to make sure this was usable power so right around 13 minutes I tested with a couple screws. The Bosch drove them a little slower than usual but finished them out and continued with winning the timed portion of this test. Again I would say usable power was probably at around 13 minutes as I got the last of it driving the final screws.
If the Makita, Bosch, and DeWalt were timed on driving 3" screws the DeWalt is the quickest. In the beginning they all were really close. Now with all of them having some charges under their belt the DeWalt will drive the fastest. I believe this might be part of the reason for the shortest NRRT. It uses lots of energy to be so quick. To put it in car terms the DeWalt has lots of horsepower but falls behind the pack with torque. But when the batteries take twice as long to charge, the DeWalt can not make that time up.
My decision has been made.............
. That is one reason I have so many cordless drills and routers:thumbup:. 
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