I fully charged the battery again and then tested it with the MicroVat (I got it the beginning of the week after replacing the subject battery.) The MicroVat passed the battery three times in a row, even once after the APP failed it. I fully charged the battery and then retested it, the APP passed it the first tiem and failed the battery the second time. It got replaced because the customer was from out of town and asked for a replacement since his alternator would support all the loads the car could give and still runn 13+ volts. But if the lights were turned on for about 2 minutes the battery was below 8 volts. The battery showed fully charged by voltage. I used it to test a battery that my APP had passed the previous week. I was lookign around to replace it and tried a Snap-On MicroVat, I gave it back the very next week. If would fail a fully charged battery that my 500 amp carbon pile tester woudl pass and the APP would show 90% or better cca left vs the rated cca.
INTERSTATE BATTERY TESTER PROFESSIONAL
For trucks that spend much of their service life running in a hot environment, McLaughlin suggests looking into batteries that feature lower CCA.I have an OTC AccuracyPlus Professional and never felt I could really trust it. Most starting batteries in trucks leaving the factory feature 650 or 700 cold cranking amps (CCA) unless spec’d otherwise for a specific application. She says when the battery pack is tested look for the following factors: State of charge of the battery pack when fully charged, the battery level is 12.65 volts for flooded batteries and 12.75 volts for absorbed glass mat or AGM hold downs and battery connection are securely fastened if the battery pack is found to be in a discharged state, the batteries should be fully recharged and tested with either a load or conductance tester. “This will indicate if one specific battery is having more of a problem than another in the system.”įor “hard starts” or shorter run with hotel loads, Paccar Parts Senior Product Director of Power Generation Jackie LeFort says it may be time to test the battery pack. “It is best to check each battery individually, not in a series,” Kohler adds. He suggests choosing a battery tester that checks OCV to verify the battery is being properly charged and also gives a reading of starting capability. Gruenstern says a good battery tester will check for other hidden signs of trouble beyond just checking the open circuit voltage (OCV) of the battery. “Extreme variations in battery voltage can mean trouble,” he says.Ī true test of a battery’s health requires a battery tester. Kohler adds any 12-volt AGM battery that is fully charged should measure about 12.8 volts. McLaughlin says for most 12-volt batteries, trucks require a 75-percent state of charge – 12.4 volts – to turn over the engine. Kohler says a basic quick check of how the battery is doing starts with a simple voltage check. Vibration, Gruenstern says, can damage a battery if the hold-down hardware is loose or missing. Also, inspect the hardware that secures the battery to the truck. The first step of a battery check, Gruenstern says, is to check the battery connections and clean the posts. In some cases, battery acid level can be checked and adjusted if necessary with distilled water.
Over time this can cause alternator stress, resulting in a premature alternator failure.” “Do not rely on the alternator to do the charging. “Optimally, you should inspect and test batteries regularly with every scheduled preventative maintenance inspection, and charge the batteries if they are low on charge,” he says. Despite that a truck’s batteries operate nearly every major component on the vehicle, Gruenstern says barely half of all fleets – just 54 percent – admit to testing them as part of routine service.
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