Removal And Installation; Battery - Jeep 1996 Grand Cherokee Service Manual

ZJ
SERVICE PROCEDURES (Continued)
may be good and the charging should be completed in
the normal manner.
Charge Rate
Voltage
16.0 volts maximum
14.0 to 15.9 volts
13.9 volts or less
CHARGING TIME REQUIRED
The time required to charge a battery will vary,
depending upon the following factors:
• Battery Capacity - A completely discharged
heavy-duty battery requires twice the charging time
of a small capacity battery.
• Temperature - A longer time will be needed to
charge a battery at -18°C (0°F) than at 27°C (80°F).
When a fast charger is connected to a cold battery,
the current accepted by the battery will be very low
at first. As the battery warms, it will accept a higher
charging current rate (amperage).
• Charger Capacity - A charger that supplies
only 5 amperes will require a longer charging time. A
charger that supplies 20 amperes or more will
require a shorter charging time.
• State-Of-Charge - A completely discharged bat-
tery requires more charging time than a partially
discharged battery. Electrolyte is nearly pure water
in a completely discharged battery. At first, the
charging current (amperage) will be low. As the bat-
tery charges, the specific gravity of the electrolyte
will gradually rise.
WARNING: NEVER EXCEED 20 AMPERES WHEN
CHARGING A COLD (-1°C/30°F) BATTERY. THE BAT-
TERY MAY ARC INTERNALLY AND EXPLODE. PER-
SONAL INJURY AND/OR VEHICLE DAMAGE MAY
RESULT.
Battery Charging Timetable
Charging
Amperage Amperes
Open Circuit
Hours Charging at 21°C (70°F)
Voltage
12.25 to 12.39 6 hours
12.00 to 12.24 8 hours
11.95 to 11.99 12 hours
10.00 to 11.94 14 hours
less than 10.00
Hours
up to 4 hours
up to 8 hours
up to 16 hours
5 10
Amperes Amperes
3 hours 1.5 hours
4 hours 2 hours
6 hours 3 hours
7 hours 3.5 hours
See Charging Completely
Discharged Battery

REMOVAL AND INSTALLATION

BATTERY

(1) Turn the ignition switch to the Off position.
Make sure all electrical accessories are off.
(2) Loosen the cable terminal clamps and discon-
nect both battery cables, negative cable first. If nec-
essary, use a puller to remove the terminal clamps
from the battery posts (Fig. 10).
Fig. 10 Remove Battery Terminal Clamp
(3) Inspect the cable terminal clamps for corrosion
and damage. Remove any corrosion using a wire
brush or a post and terminal cleaning tool, and a
sodium bicarbonate (baking soda) and warm water
cleaning solution (Fig. 11). Replace any cable that
has damaged or deformed terminal clamps.
20
Fig. 11 Clean Battery Cable Terminal Clamp
BATTERY 8A - 11