Premier L4-150 2.5L (1988)
5.
Read the voltage after 15 seconds with the specified load applied, then remove the load.
6.
If voltage did not drop below the minimum listed in Load Test - Chart 3, battery is good and should be returned to service. (Battery temperature
must be estimated.)
7.
If the battery passes the load test, it is in good condition and no further tests are necessary. If it fails the load test, it should be replaced.
OPEN CIRCUIT VOLTAGE
Open circuit or no load voltage is a good measure of battery state of charge after battery has stabilized. The battery is stablized if there has been no
heavy load applied immediately preceeding the open circuit test. If a heavy load has been applied such as a heavy load test, the battery will have to sit
with no load for a few minutes to recover.
1.
Remove both battery cables and place a voltmeter between battery posts.
2.
Chart 4 shows the relationship between open circuit voltage and state of charge:
BATTERY CHARGE
PERCENT - CHART 4
Open Circuit Volts
Percent Charge
11.7 volts or less
0%
12.0
25%
12.2
50%
12.4
75%
12.6 or more
100%
Because the change in voltage relative to the state of charge is small, most battery testers use special voltmeters with scales expanded to better show
percent charge. If the charge is 75% (12.4 volts) or more, the battery is considered charged. If it failed the load test with more than a 75% charge, it
should be replaced.
Battery Charging Procedures
WARNING:
WHEN BATTERIES ARE BEING CHARGED AN EXPLOSIVE GAS MIXTURE FORMS BENEATH THE COVERS OF EACH
CELL. DO NOT SMOKE NEAR BATTERIES ON CHARGE OR WHICH HAVE RECENTLY BEEN CHARGED. DO NOT BREAK
LIVE CIRCUITS AT TERMINALS OF BATTERIES ON CHARGE. CHARGER SHOULD BE TURNED OFF OR UNPLUGGED
BEFORE DISCONNECTING. A SPARK WILL OCCUR WHERE LIVE CIRCUIT IS BROKEN. KEEP ALL OPEN FLAMES AWAY
FROM BATTERY. DO NOT CHARGE FROZEN BATTERIES.
Battery charging equipment varies from one manufacturer to the other. Therefore, follow specific charger manufacturer's instructions of proper setup and
safety precautions.