LZ: Re: Batteries
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LZ: Re: Batteries
The AAA batteries are always used unless they cannot supply the power demands
from the calculator. Even when the calculator is off, the AAA batteries are
used. If the batteries are removed or run out, the calculator will
automatically switch to the lithium battery. This is hard-wired to the
circuit board. The calculator itself never involves itself with the power
sources; the printed circuit board checks the batteries and changes sources.
If the calculator is on when a battery is removed, the circuit board will
still jump to the lithium battery. The problem is that the lithium battery is
nowhere near powerful enough to run the entire calculator (duh). You would
think that this will drain the lithium bttery when a battery is removed while
the calculator is on. The actual drain on it is minimal, though. As soon as
the calculator has less than the power needed to function, it stops operation
completely. The fact that the calculator COMPLETELY shut down is what erased
the memory. The calculator is always active to some degree (waiting for the
on key, which can be run by the lithium battery). It's when the calculator
shuts down complelely that you lose your memory.
NOTE: This is based on my personal research and experimentation. It may not
be 100% accurate, but it's close.
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