Heres a quick guide to the results: For readings that are over 12.5 volts, it means that your battery is charged and in great shape. Rechargeable. Q: At what voltage should a car battery be replaced? I was extremely satisfied with his services. Charge a severely discharged battery like that at 2 amps - higher currents will encourage hard sulfation of the plates, and being down to 8 volts it is already hurting. if two cells go bad it would read around 8 volts. (You don't mention it, but the security light in Hello there. Once you start the car, the alternator generates additional electric power to recharge the battery. if it won't charge or stay running it my be your alternator is bed. i'd jump start it and drive it to local auto parts store and have them test system. Fast, free online quotes for your car repair. That does not sound like a knackered battery to me. Made with in Silicon Valley. A brand new fully charged battery will test 12.85 volts. A fully charged battery will usually show a voltmeter reading of approximately 12.6 to 12.8 volts. $74.99 $ 74. A good, healthy car battery should have no fewer than 12.6 volts. Unless you're able to take the car out for a Honda Accord V6-3.0L - Battery - Norwalk, California. A reading of 12.65-12.77 volts means your battery has a full charge. Answered in 7 hours by: 1/9/2010. During starting the batteries voltage will decrease for a short time, before going up to the running voltage (see below). Show Less. With a battery what you put in you get out. Over the past year I've been monitoring my outdoor deep cycle battery I use in a standalone solar installation, the battery is always at 100% full because there is no current currently drawn on a regular basis, when I check the voltage reading directly on the battery it goes as high as 16.x volts FREE Shipping . To check if you have a drain, you will need a volt meter. Check the reading. Lifting it out of the car can be hard on your back. An average car battery has a capacity of around 48 amp hours which means that, fully charged, it delivers 1 amp for 48 hours, 2 amps for 24 hours, 8 amps for 6 hours and so on. well even a flat battery will still read 12 volts, a car battery is made up of 6 two volt cells. Is 11.9 volts enough to start a car? Category: Pontiac. Running cars have alternator voltage regulators set between 13.5 and 16V. If the battery is reading at 12.4 volts, then it's 75% charged. Measure and Analyze When the probes touch the terminals while the car is off and the battery is resting, the multimeter display should show a reading of 12.2 to 12.6 volts (full charge). Car won't start, lights won't work either. Then your mechanic may either use a multimeter/voltmeter, or a dedicated battery tester. I have a aero golf cart and it wont go but the light blinking? The 12-volt battery needs 13.8 volts to be fully charged. Golf Cart Battery Load Testing Results Explained 6 volt battery will need to maintain 5 volts for 15 seconds at the advertised 20hr YourMechanics technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. But it won't Fully charged automotive batteries should measure at 12.6 volts or above. That's okay if you're testing dry cells, you just connect it a to a lamp or put a resistor across it. Any voltage above 12.9 volts is a good indicator that your battery has excessive voltage. Is this a dead battery or something else? Any readings below 11.9 Even if you put a current limiting resistor is series with the 12 volt charger, you will have to monitor the voltage of the 8 volt battery to keep the charger from overcharging the battery. Nice to have someone so knowledgeable, personable and efficient! Wish all my interactions with professionals was like the one I had with Kenneth~, Dodge Intrepid V6-3.5L - Battery - Loganville, Georgia. The best way is test it with a hydrometer, you can change the acid (that's a bit drastic) and of course you could charge it up over night and test it with the hydrometer again. what is the purpose of a parking brake when putting a vehicle in gear is enough to hold it on a hill? The car battery is rechargeable. Most popular 8 volt golf cart batteries used in electric cars Two major brands of 8 volt golf cart battery dominate with respect to EV popularity: Trojan, with their most popular T-875, the leader by far, and their T-860 (less AH) and T-890 (more AH); and US Battery with their 8VGC family. It's almost dead. also batteries getting old colects sulphate on plates ,this degrades the cold start performance. Therefore, voltage in a battery pack within a golf cart will be comparable to the horsepower in a car. A meter reading of 12.2 volts or 12.0 volts will indicate a charge rate of 50 percent and 25 percent, respectively. Yahoo Answers is shutting down on May 4th, 2021 (Eastern Time) and the Yahoo Answers website is now in read-only mode. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. Next time, disconnect the battery and hook it up to the charger. 6 .Disconnect the jumper cables from the good battery. Get it as soon as Wed, Apr 14. Place the positive lead from the meter onto the cable that goes to the negative on the battery. Charge a severely discharged battery like that at 2 amps - higher currents will encourage hard sulfation of the plates, and being down to 8 volts it is already hurting. If the battery is in the vehicle at the time of discovery then I would investigate for lights and switches that were left on. Honda Civic L4-1.3L Hybrid - Battery - College Park, Maryland. Battery is less than 6 months old and no problems until now. Use a temperature compensating battery hydrometer for this test. $24.99 $ 24. PS: Oh my gosh. There are two ways to do this. Batteries do eventually die of old age, but you can prevent your car battery from discharging for lack of proper maintenance: Once a month pop the hood and check the battery terminals for corrosion; check electrolyte level (in batteries with removable caps); make sure the battery is held firmly in its tray to prevent damage; and maintain the battery and terminals clean and tight. ML35-12 Gel - 12 Volt 35AH Rechargeable Gel Type Battery - Mighty Max Battery Brand Product. This is the method used for non-sealed lead acid batteries. There are few things more frustrating than discovering that your car wont start because the battery is dead. Up to this voltage and at normal temperatures, the battery will only gas very slightly. Our certified mobile mechanics make house calls in over 2,000 U.S. cities. If you are stuck with 8-Volt batteries that have not been used for quite some time, using the 8-Volt battery charger alone may appear inadequate. This means that a car batterys amperage is more than 300 amps. That is a fully discharged battery. How many volts should a car battery have? Country Boy is right - all you can do is make it right and see how it performs. 1.124 means you have a dead battery. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. A meter reading of 12.2 volts or 12.0 volts will indicate a charge rate of 50 percent and 25 percent, respectively. I would recommend him to anyone who needs a mechanic. A specific gravity of 1.269 means that the battery is fully charged. If your voltmeter is showing a voltage anywhere between 12.4 and 12.8, that means your battery is in good shape. Was a great experience, he was very professional & friendly.. i couldnt stop smiling when I heard my car start again.