Chrysler 300M 2002 Service Manual page 275

8F - 6 BATTERY SYSTEM
BATTERY SYSTEM (Continued)
• Cold Cranking Amperage - The Cold Crank-
ing Amperage (CCA) rating specifies how much cur-
rent (in amperes) the battery can deliver for thirty
seconds at -18° C (0° F). Terminal voltage must not
fall below 7.2 volts during or after the thirty second
discharge period. The CCA required is generally
higher as engine displacement increases, depending
also upon the starter current draw requirements.
• Reserve Capacity - The Reserve Capacity (RC)
rating specifies the time (in minutes) it takes for bat-
tery terminal voltage to fall below 10.5 volts, at a
Part Number
N/A
N/A
SPECIAL TOOLS
BATTERY SYSTEM SPECIAL TOOLS
MICRO 420 BATTERY TESTER
BATTERY
DESCRIPTION
Maintenance-free batteries have non-removable
battery vent caps (Fig. 2). Water cannot be added to
this battery. Under normal service the composition of
this battery reduces gassing and water loss at nor-
mal charge rates. If the battery electrolyte level
becomes low, this battery must be replaced.
BATTERY CLASSIFICATIONS & RATINGS
BCI Group Size Cold Cranking
Classification Amperage
N/A
N/A
discharge rate of 25 amperes. RC is determined with
the battery fully-charged at 26.7° C (80° F). This rat-
ing estimates how long the battery might last after a
charging system failure, under minimum electrical
load.
• Ampere-Hours - The Ampere-Hours (AH) rat-
ing specifies the current (in amperes) that a battery
can deliver steadily for twenty hours, with the volt-
age in the battery not falling below 10.5 volts. This
rating is also sometimes identified as the twenty-
hour discharge rating.
Reserve
Capacity
500 110 Minutes
600 120 Minutes
Fig. 2 LH Maintenance-Free Battery
1 - POSITIVE POST
2 - VENT
3 - CELL CAP
4 - TEST INDICATOR
5 - CELL CAP
6 - VENT
7 - NEGATIVE POST
8 - GREEN BALL
9 - ELECTROLYTE LEVEL
10 - PLATE GROUPS
11 - MAINTENANCE-FREE BATTERY
The battery is a device used to store electrical
energy potential in a chemical form. When an electri-
cal load is applied to the battery terminals, an elec-
trochemical reaction occurs within the battery. This
reaction causes the battery to discharge electrical
current.
The battery is made up of six individual cells that
are connected in series. Each cell contains positive
Ampere - Load Test
Hours Amperage
60 250
60 300
LH