Car Battery Testing & Voltage
It’s vital to check your battery and electrical system often, not simply once it’s setting out to show signs of weakness. Proactively testing it (or ensuring your mechanic does) doubly a year can facilitate scale back your probabilities of failure. Most retailers supply an easy free 5 minute battery take a look at. Use our realize a distributor for a location close to you to induce a free battery take a look at.
When absolutely Charged, what percentage Volts ought to A lead-acid accumulator Have?
Fully charged automotive batteries ought to live at twelve.6 volts or on top of. once the engine is running, this measure ought to be thirteen.7 to 14.7 volts. If you don’t have a multi-meter to inform you the voltage of your battery, you’ll be able to do a take a look at of your electrical system by beginning the automobile and turning on the headlights. If they’re dim, that indicates the lights square measure running off the battery which very little or no charge is being created by the generator. If the lights get brighter as you rev the engine, it suggests that the generator is manufacturing some current, however might not be manufacturing enough at idle to stay the battery properly charged. If the lights have traditional brightness and don’t change because the engine is revved, your charging system is maybe functioning unremarkable. If you’ve been experiencing issues together with your battery system and also the headlamp take a look at checks out okay, you must check whether or not or not the battery is holding a charge, or if one thing on the vehicle is discharging it.
How does one Perform A Load Test?
To pass a load take a look at, the battery should maintain nine.6 volts at fifteen seconds once tested at common fraction the CCA rating and 70°F (or above). This take a look at should be finished a real load (carbon pile) and not one among the hand-held testers that employment off a electrical phenomenon rule. The take a look at should be run with the battery in an exceedingly high state of charge. take care to scan and follow all safety and handling directions on the battery, this web site and your battery tester. If you’d like your battery tested, use our realize a distributor for a location close to you.
generally Here are the easy steps:
Check Your Battery with a Voltmeter Turn your ignition off.
Remove the battery’s positive terminal cover. Check and clean the battery terminals.
Connect your voltmeter’s positive lead to the positive terminal on your battery. The positive lead on a voltmeter is usually red.
Attach the negative voltmeter lead to the negative battery terminal.
Check the voltmeter. If your battery is in good condition, the voltage should be between 12.4 and 12.7 volts. A reading lower than 12.4 volts means that your battery needs to be charged.
If the reading is lower than 12.2 volts, “trickle charge” the battery, which is a slow charge. And then re-check.
If the reading is over 12.9 volts, you have excessive voltage. Turn on the high beams to remove excessive voltage surface charge. Over voltage may be an indication the alternator is over charging the battery.
While you have the voltmeter handy, you may also want to do load testing. Remove the battery’s positive terminal cover. Connect your Power Probe’s positive lead to the positive terminal on your battery. The positive lead on a voltmeter is usually red.Attach the Power Probe’s negative lead to the negative battery terminal.Connect the tip of the probe to the positive battery terminal. Check the probe for voltage reading.Check the Power Probe reading. If your battery is in good condition, the voltage should be between 12.4 and 12.7 volts.Check Your Battery by Cranking the Engine.1 “Crank” the engine by turning the ignition until the starter engages and hold for 2 seconds Have an assistant crank the engine while you check battery voltage.At the time of the crank, check the reading of the Power Probe. It should not go below 9.6 volts. A battery with a volt reading less than 9.6 volts means the battery is sulfates and not holding/accepting the charge.