Exide Battery
SAN BATTERY SHOP
Trivandrum
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Car Battery Testing & Voltage
It’s important to test your battery and electrical system
regularly, not just when it’s starting to show signs of weakness.
Proactively testing it (or making sure your mechanic does) twice a year
will help reduce your chances of failure. Most retailers offer a simple
free five minute battery test. Use our Find a Retailer for a location
near you to get a free battery test.
When Fully Charged, How Many Volts Should A Car Battery Have?
Fully charged automotive batteries should measure at 12.6 volts
or above. When the engine is running, this measurement should be 13.7 to
14.7 volts. If you don’t have a multimeter to tell you the voltage of
your battery, you can do a test of your electrical system by starting
the car and turning on the headlights. If they are dim, that indicates
the lights are running off the battery and that little or no charge is
being produced by the alternator. If the lights get brighter as you rev
the engine, it means the alternator is producing some current, but may
not be producing enough at idle to keep the battery properly charged. If
the lights have normal brightness and don’t change intensity as the
engine is revved, your charging system is probably functioning normally.
If you’ve been experiencing problems with your battery system and the
headlight test checks out okay, you should check whether or not the
battery is holding a charge, or if something on the vehicle is
discharging it.
How Do You Perform A Load Test?
To pass a load test, the battery must maintain 9.6 volts at 15
seconds when tested at one-half the CCA rating and 70°F (or above). This
test must be done with a true load (carbon pile) and not one of the
hand-held testers that work off a conductance algorithm. The test must
be run with the battery in a high state of charge. Be sure to read and
follow all safety and handling instructions on the battery, this website
and your battery tester. If you would like your battery tested, use our
Find a Retailer for a location near you.
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