On Fri, 6 Nov 2009 16:52:21 -0600, "Leon"
wrote:


MY BOSCH battery has no such charge indicator. Additionally when the Li
battery decides to be empty, it is empty. It gives you the warning that it
is about to be completely depleted when it slows down half way through
driving "a" 2" screw. It does not completely drive the screw, it just slows
down and stops, on that screw. That's it. With the NiMH you typically get
a warning several screws before depletion.

That's because NiMH loses voltage as it loses charge, but Li-ion
maintains a steadier voltage and then dies. It's really just a
voltage reading of the battery.

My cameras are like that. They have a 3 position battery status
indicator, which loosely translate to full, you need a new battery,
and you will never actually see this unless you happen to be looking
right at it in the 2 seconds it shows before the camera dies.


-Kevin