Advertisement
a
HOW TO REPLACE THE BATTERY UNIT
If the battery cannot be used for longer than one hours or so
even after about 5-hour charging with the power switch set
at OFF
position or about 13 to 15 hours charging with ON
position, the battery life is almost terminated, In such a case,
the battery unit must be replaced with a new one.
Furthermore
when
the calculator
is to be used for a long
time with DC power,
it will be very convenient to use this
battery unit as a spare. Since the user is requested to change
the battery unit, please exchange the battery unit in a proper
manner according to the procedures mentioned below. If the
battery unit is set in a wrong way or touches the other ele-
ctronic parts, troubles may be caused. Therefore,
replacement
of the battery unit must be carried out with sufficient care.
1. First set the power switch to OFF position, and then re-
move the screw located on the back of the EL-811(Fig. 1).
At this time, protect the calculator by putting a soft cloth
under
the
calculator.
Unhook
the
bottom
cabinet
by
pulling it ahead slightly. (Fig. 2).
2. Remove
the battery unit: Grasp the battery case as fig. 3
and lift up A-side while giving a power in the direction of
arrow mark.
Advertisement
