Midtronics Inc. 7000 Monroe Street Willowbrook, IL 60527
www.midtronics.com
13
EXP-803 Chapter 3: Battery Test
State of Health (SOH)
The battery’s state of health represents its general condition,
and therefore its ability to deliver the specied performance
compared with a fresh battery.
Although a poor state-of-health can be the result of defects
in construction, it is most often caused by normal wear, which
depends on vehicle needs, climate, and operating conditions.
These cause irreversible physical and chemical changes within
the battery until it can no longer hold a charge and supply
the power to start the car and provide auxiliary power to the
electrical system.
As the battery approaches end of life, its deterioration
accelerates until it nally fails to start the vehicle. Before
failing, the battery may start the vehicle under normal
conditions but may not be able to operate in more extreme
conditions. Extreme heat or cold could expose a weak battery
and cause it to fail.
Battery Decisions
Decision Recommended Action
GOOD
BATTERY
Return the battery to service.
GOOD–
RECHARGE
Fully charge the battery and return it to
service.
CHARGE
REQUIRED
Fully charge the battery using a Midtronics
Diagnostic Charger and retest. Failure to
fully charge the battery before retesting
may cause false readings. If CHARGE
REQUIRED appears again after you fully
charge the battery, replace the battery.
REPLACE
BATTERY
A REPLACE BATTERY result may also mean
a poor connection between the battery and the
vehicle. If you tested the battery using the IN-
VEHICLE Test, disconnect the battery cables
and retest using the OUT-OF-VEHICLE Test
before replacing it.
BAD CELL–
REPLACE
Replace the battery.
WARNING: Do not charge the battery.
Charging a battery with one or more bad
cells could cause an explosion and serious
harm to the user.
24 VOLT
BATTERY
24-volt battery detected. You are attempting
to test in-vehicle both batteries in a 24-volt
system. Disconnect the batteries and test
them individually.
NOTE: When testing at remote posts, the analyzer
may need to verify a possible REPLACE result. It will
give you the option of retesting at the battery posts.
When testing at side posts, the analyzer may nd that the data
is inconclusive and instruct you to test with side post adapters.
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