Texas Instruments TI Programmable 57 User Manual

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APPENDIX A:
BATTERY AND
AC OPERATION
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When
the
battery
pack
is
fully
charged,
the
calculator
will
operate
approximately
3
to.4
hours
before
recharging
is
necessary.
However,
don't
hestitate
to
connect
the
adapter/charger
if
you
know
or
suspect
the
battery
pack
is
nearly
discharged.
A
battery
pack
near
discharge
can
adversely
affect
all
calculator
operations
giving
erroneous
results.
A
discharged
battery
pack
is
typically
indicated
by
a
dim,
erratic
or
blank
display.
While
individual
cell
life
in
a
battery
pack
is
difficult
to
predict,
under
normal
use,
rechargeable
batteries
have
a
life
of
2
to
3
years
or
about
500
to
1000
recharge
cycles.
Pertopic RECHARGING
Although
the
calculator
will
operate
indefinitely
with
the
adapter/charger
connected,
the
rechargeable
battery
pack
can
lose
its
storage
capacity
if
it
is
not
allowed
to
discharge
occasionally.
For
maximum
battery
life,
it
is
recommended
that
you
operate
the
calculator
as
a
portable
at
least
twice
a
month,
allowing
the
batteries
to
discharge,
then
recharge
accordingly.
Excessive
Battery
DiscHARGING
If
the
calculator
is
left
on
for
an
extended
period
of
time
after
the
battery
pack
is
discharged
(accidentally
left
on
overnight,
for
example),
connect
the
adapter/charger
for
at
least
24
hours
with
the
calculator
OFF.
If
this
does
not
restore
normal
battery
operation
the
battery
pack
should
be
replaced.
Repeated
occurrences
of
excessive
battery
discharging
will
permanently
damage
the
battery
pack.
STORAGE
If
the
calculator
is
stored
or
unused
for
several
weeks,
the
battery
pack
will
probably
need
recharging
before
portable
use.
The
battery
pack
will
not
leak
corrosive
material;
therefore,
it
is
safe
to
store
the
calculator
with
the
battery
pack
installed.

Texas Instruments TI Programmable 57 Specifications

General

Brand	Texas Instruments
Model	TI Programmable 57
Category	Calculator
Language	English