Batteries; Reserve Capacity Rating; Battery Coding; Battery Replacement - Jeep 1979 CJ-5 Technical & Service Manual

1D-1
B A T T E R I E S
S E C T I O N I N D E X
Page
Page
Charging
114
Replacement
ie-2
Sinani
1D-1
Specifications
1D-8
Maintenance
1D-2
Testing 1D-5
GENERAL
For 1979, all Jeep batteries use plates containing low-
antimony lead compound. The benefits are less-frequent
electrolyte check, lower self-discharge rate and longer
shelf life. It is necessary to check electrolyte only at the
beginning of the winter season and every 15,000 miles. A
difficult-to-remove cell cap design which discourages
casual removal is used on optional batteries. Some 1979
models are equipped with a smaller, lightweight battery
with conventional cell caps and a reserve capacity of 75
minutes.
The battery rating designation refers to the reserve
capacity. Refer to Reserve Capacity Ratings Chart be-
low. Jeep batteries are available in three ratings: 75, 95
and 110 minutes. A dealer-installed optional battery is
rated at 135 minutes. Each rating has the capacity to
provide the starting power needed for specific engine
applications and accessories. All batteries are 12-volt,
lead-acid units, which use a common battery tray, but
two different holddowns. When installing an optional
battery, use the correct battery holddown. Refer to
Specifications for a particular battery model.
WARNING: Explosive gases are present within the
battery at all times. Avoid open flames and sparks.
Wear eye protection when servicing any battery.
Reserve Capacity Ratings
Reserve Capacity Cold Crank Color
(Minutes) (Amps) Code
75
380
Green
95
385 Green
110 410 Red
135* 440 Blue
* Dealer-installed o p t i o n only
80379
I
Cold Crank Rating
The cold crank rating specifies the minimum amps a
fully charged battery will deliver at 0°F for thirty sec-
onds without falling below 7.2 volts.
iittirf Coding
Each battery is date coded at the time of shipment
from the manufacturer. This code is stamped into the
edge of the plastic case cover (fig. 1D-1). A second num-
ber stamped on the side of the battery case contains
manufacturing codes which may be ignored.
The date code is decoded as follows:
• M o n t h : A—Jan., B—Feb. (the letter I is not used)
• . Year: 8—1978, 9—1979
REPLACEMENT
-RiSirwiCapailtf Rating
Reserve capacity is defined as the number of minutes
a fully charged battery at 80°F (26.7°C) can be dis-
charged at a steady 25 amperes and maintain a voltage
of 1.75 volts per cell (10.50 volts total battery voltage) or
higher. Reserve capacity ratings of Jeep batteries are
identified by color codes.
Rotnoval
(1) Loosen cable clamps.
(2) Use puller to remove negative (ground) cable
from battery terminal. Then remove positive cable.
(3) Note location of positive and negative terminals
so b a t t e r y can be p r o p e r l y positioned d u r i n g
installation.