dennis@home wrote:


"Dave Plowman (News)" wrote in message
...

There's a world of difference between a cheapo drill and a decent one in
performance - and mainly down to the better batteries. Good make
batteries
give much more low end torque and make the tool more useful for
screwdriving, etc. I re-celled a PPro 18v with decent cells and it
improved it enormously. But it doesn't feel as nice to use as my Makita.

I find this hard to understand.
Even cheap cells will supply more than enough current for the motor to
run at its maximum.

Two points really; firstly the cheaper cells often don't supply the same
current - so the run speed may be the same, but the maximum torque is
less - sometime by quite a margin.

Secondly remember that battery packs are made from multiple cells. The
cheaper cells are often less well matched than the batter quality ones.
A pack made from mismatched cells will not perform as well to start
with, and will also fail sooner since individual cells will fail doe to
abuse sooner.

I do know that cheap cells may not last as long but I seriously doubt if
you could make a PPro run better by just swapping the cells unless the
original cells were already faulty.

They probably were in a sense...

--
Cheers,

John.

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