So, if your car just seems to be completely void of all signs of life, then your battery is the first thing you should be looking at. Most likely. If the jumper cables and the battery you are charging have enough power, the car engine should turn over easily and start. If it still won't start, repeat the process. Meanwhile, if the voltage reading is at 12.4V, it means your battery still has 50% energy. It is very important to check that the clasps are properly connected to the batteries else the dead battery will not get proper juice from the working car battery. Take notice of its physical condition and see whether it has any cracks or leaky areas on it. However, it must be the same voltage as the car being jumped. A car with a working battery: Unless you’ve got a power box on hand, you’ll need another car to get your battery juiced up. Charging it by bounding the battery with a running car … As you might know by now, the alternator is always charging your car battery while driving. So, put those jumper cables aside, and check out these seven things that could explain why your car battery keeps dying. If the voltage reading is flat at 12.0V, then your battery is flat dead. The average car needs two things to keep it running all the time: fuel and a battery. My car is completely dead. If you find that your battery is not working completely, then you can give a jump start try. While a “dead” battery is often defined as a battery that simply cannot start the car, Below are several things that could indicate a bad battery, and if you see them, you can always visit an AutoZone store for a free battery and charging system test. ... trunk of the car that has a circuit board in it and many wires that lead into this box can fry the alternator or the battery while the car is off. I last used my car on Thursday and this morning my car was dead. Start the car with the dead battery. A modern battery may not require additional water over its useful life; some types eliminate the individual filler caps for each cell. Thank You!! 1) Inspect the Battery. Your battery is completely dead or terminally damaged: Your car battery works hard, day in and day out. Despite following the above procedure correctly the engine does start, you probably need a new battery. Try to start the engine of the car that contains the dead battery. If your car battery is below 12 volts, use a dedicated charger. And be aware that in this situation, where your vehicle doesn't even have the juice to work the lights or turn over the engine, it could be a combination problem involving your alternator as well. It is quite difficult to figure out the charging time of a dead car battery. What we'll do to help. The battery in your car can go dead for any number of reasons leaving you stranded. While your vehicle’s alternator can keep a healthy battery charged, it was never designed to completely recharge a dead car battery. When I googled this problem, the most common answer weas dead battery but I bought a new battery a month ago. At its most basic, a car battery is constructed of alternating plates of dissimilar metals, usually lead and lead oxide (Pb and PbO 2 ), in an electrolyte bath, usually sulfuric acid (H 2 SO 4 ) in water. 2-4 ampere is typical for maintenance charging, and it will take around 24 hours to fully charge a dead battery at this load. No lights, radio, odometer, click, nothing. When you have done, and your engine gets going, remove the jumper cables in the reverse order (negative first and then positive). Before you even begin attaching jumper cables to your dead battery, you should inspect the battery first. Otherwise you can use a regular 12 volt or 24 volt battery charger for a car, boat or Rv to get some energy back into those dead batteries. When waking up to a dead battery and you cannot start your BMW anymore, many people rush to buy a new battery… Usually, a standard car battery charger is giving out 4-15 amperes. As the dead battery gets the juice from the working battery, the owner should slowly and smoothly turn on the car. A car battery is a rechargeable battery. We are also the official distributor for Century battery and Korea No.1 car battery brand – Rocket Battery. If the car still seems to be completely dead, check your connections. At some point, usually between the three-year and five-year mark from new, your battery will wear out and need replacing. More realistic as well because you or neighbor probably have one handy. And if you have not yet encountered such circumstances, there is no guarantee that you never will. If your car battery won't hold a charge, is completely dead or starts with a. As letting the batteries go completely dead is very bad for the batteries and will definitely cut the life expectancy short. Yes, but it depends on what you mean by "dead." For a quick video on how to recondition your car batte. If it starts, let it idle for at least 20 minutes, or go on a five-mile drive so the battery can recharge. Now start the dead car. For this, you need a jumper cable and another car to ignite your car’s battery.Connect the two ends of one side of the jumper cable to your battery and the other end to the working battery in a car.