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Power and Batteries
The
HP-275
is
shipped
with
three mercury batteries.
A
fresh set of
three mercury or silver oxide batteries provides approximately a year
of
normal
use.
(Alkaline batteries last about half
as
long.) However,
expected
battery
life
depends
on how the calculator is
used.
Printing
and long computations require much more power than
other
operations.
Use
only fresh, button-cell
batteries.
Do not
use rechargeable
batter-
ies.
The
following
batteries
are
recommended
for
use.
Not all
batteries
are available
in all
countries.
Mercury
Panasonic NP675
Alkaline
Silver Oxide
Panasonic
LR44
Panasonic
SR44W
or
SP357
Duracell
MP675H
Varta
V13GA
Eveready
357
Tloshiba
NR44
or
MR44
Eveready
A76
Ray-O-Vac
357
Radio Shack NR44
or
MR44
Duracell
LR44
Varta V357
Eveready EP675E
Low-Power lndications
When the low-battery annunciator
(E)
comes
on, the
calculator
can continue normal operations
for
several
hours.
If
the calculator
is
turned off, Continuous Memory
will
be preserved
for
approximately
two
weeks.
To conserve battery powe{,
printing
does
not
function
when the battery annunciator is on. Printing may halt during
a
print-
ing operation due to
a
borderline low battery condition; the calculator
can detect
insufficient power for printing before the battery annunci-
ator
comes
on.
If
you continue to use the calculator after the battery
annunciator
comes
oil, power
can eventually drop
to a
level
at which the
calcu-
lator
stops
powering
the display and
keyboard. The calculator
will
require fresh batteries before
it
can
be turned on. When you
furn
the
calculator
on after fresh batteries have
been
installed, the HP-27S dis-
plays
l'l
tl
rl H
I
t'{
E
F;
E:lE
T
if
your stored data is intact
or
t'l
E
f'lrl
F;
*r'
L
Il5
T
if
data has been
lost.
In
either
case,
the clock may
be
incorrect.
A: Assistance, Batteries, Memory and
Service
191
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