A 12v drill can have "exactly" the same power a 24v drill. That is not a
problem. To have them last the same amount of time in drilling, the 12v
drill will need a bigger battery in A/hrs.
This adds cost as battery cells are expensive and are the main cost of a
So, as batteries are expensive compared to knocking out motors en-mass, they
go for larger voltage motors and then the batteries do not have to be as big
(or as heavy, which is major point). They are balancing one against the
other to keeps costs down. That is using the same type of battery of course,
Current marketing means that generally the larger the voltage the greater
the power - so the punter then can gauge the products on the market. All
understood, all de-facto standard.
Now, a 12v drill can be the same power as a 24v drill, no arguments about
that. Battery types are changing with Lith-Ion being introduced. That
means that a 12v drill can be the same power as 24v drill, but put a
Lith-Ion battery in it and matters change as these can be so much smaller in
physical size and hold so much more energy. So a 12v Lith-Ion drill can
match a 24v Ni-Cad drill in power and battery life and be at least the same
weight, or even lighter. BUT!!! That is comparing apples with oranges
(Lith-ion and Ni-Cads).
Using the same battery type we are back to stage one. Using 12v and 24v
Lith-Ion with the same power still means the 12v drill will need a larger
battery in A/hr to last the same amount of running time. Although all
drills using Lith-Ion will be smaller & lighter than Ni-Cads.
You don't know that identical sized cells come in different capacities?
And don't vary in weight by very much?
Higher voltage drills impress the unwary at the bottom end of the market.
You should be well used to that.
*Be more or less specific *
Dave Plowman firstname.lastname@example.org London SW
The fact of the matter is that the only cell usable a few years ago was
the NiCd Sub C of about an ampere hour capacity. They couldn't really do
more than about 25A, so if you wanted more power you stuffed in more o them.
Hence teh more powerful drills had to use more of them.
However what determines the power with modern cells, is the motor - the
cells will do 50-70A or good ones will, and capacities are pushing 4Ah.
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