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Batteries

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How To Jumpstart Your Car
A how-to guide to jumpstart your vehicle in the event of a dead battery. You'll need jumper cables, safety glasses, and a properly starting car.
How to Clean Battery Connections
Cleaning your battery connections, especially if the terminals are corroded, will help ensure the battery lasts longer and performs well.
How to Check a Car Battery
It never fails - you’re in a rush and the kids are throwing a tantrum in the backseat. You go to start your car and all you hear is a...
How to Diagnose a Car Battery Drain
It is safe to say that every car owner reading this has likely experienced that time where you were leaving your home or walking out to your sitting car,...
How to Change a Car Battery
Changing your car battery is a simple and easy automotive repair that you can actually accomplish yourself with the right preparation and a little physical strength. While most people realize...
How to Deal With a Dead Battery
If your battery appears to be dead, try a few steps to start your car before determining if it needs to be replaced or towed.
How to Care for Your Car Battery
How How to Care For Your Car Battery Your car’s battery may have been neglected if you have difficulty starting your car, and it is usually when the weather turns...
How to Fix a Car That Won’t Start
Having a car that doesn't start is frustrating. Try a battery test, fuel pump test, and check the spark plugs to help get your car started again.
How to Buy a Battery for Your Car
Your car battery is a storage device for the electrical power you need to start your car and operate your car’s options. If your car battery isn’t working as it...
How to Check Electrolyte Levels in Your Battery
Part of what makes a modern battery work so effectively is the ‘wet cell’ design they utilize. In a wet cell battery, there is a mixture of...
How to Change Battery Cables
Although simple in nature, battery cables are one of the most important components of a vehicle’s electrical system. They serve as the main connection between the vehicle’s main source of...
How to Use a Battery Charger
Most people who have been around cars for a good chunk of their lives have experienced the hassle and inconvenience associated with a dead battery. Sometimes it simply happens...
How to Buy RV Batteries
RV (recreational vehicle) batteries come in many different types, and what type is best depends on the useage and conditions the RV will be exposed to. Unlike cars, RV’s use multiple...
How to React If Your Battery Light is On
The battery light or charging warning light, available on the dashboard of your car, indicates malfunctioning or poor charging of the battery. This light illuminates whenever the...
Electric Cars and How They Work
Electric cars use an electric motor driven by a control unit. Their batteries are filled at charging stations and they produce no tailpipe emissions.
How to Attach a Car Battery-Mounted Power Cut-off Switch
Many people who store their vehicle for a length of time like to disconnect the battery from the electrical system of the vehicle. This prevents the vehicle from unintentionally draining the...
How to Replace a Key Fob Battery
Key fobs allow easy access to your car. Once the key fob battery is weak or dead you'll lose your fob's ability to control remote functions.
10 Best Miniature Jumper Packs For Your Car
Jumper cables and jumper packs charge your car battery when it needs a boost. The NOCO Genius Boost Plus is the best spark-proof, miniature pack.
3 Ways to Increase Car Battery Life
Car battery life is 2 to 6 years. Extend the life of your car battery with regular maintenance and turning off the headlights when the engine is off.
How to Replace a Car Battery Temperature Sensor
The battery has a battery temperature sensor that can fail if the Check Engine Light comes on, the battery voltage is low, or the RPM curve surges.

Related questions

Question
Can't figure out how to disconnect negative battery cable
Hi Lisa: the picture you sent shows a conventional post and terminal connection held on with a through bolt and nut. The nut is probably around 10 or 12 MM (if metric). You can just use a box end wrench...
Question
Just put a new carburetor, battery, starter relay, alternator, car stalls out while driving and battery dies when restarted
The battery should be load tested. Simply charging the battery or measuring voltage is not adequate. Measure charging output, too. You want to confirm that the ignition system, including for instance the ignition coil and ignition switch, are not intermittently...
Question
A battery saver active message came on this morning on my 2009 Chevy UPlander. Do I need to have the battery checked?
A logical first step is to have the battery load tested and, at the same time, measure the output of the charging system to determine if the charging system is functioning. If the battery fails the load test (OR only...
Question
Car battery dead but it turns on with cables but when I leave it off for 30 mins it dies
If you can restart the car after driving it but if vehicle sits for more than 30 minutes then will not crank the engine then you most likely have a bad battery due to dead cells inside the battery. Replace...
Question
I had a shop from http://BMWmechanicBoca.Com tell me that I may need a battery registered for my BMW
Hello, thank you for writing in. Typically when you are prompted to register a new part or accessory, you are doing so for the warranty. This is a process of contacting the company and letting them know that you have...
Question
Changed battery now won't start
If prior to changing the battery you had no problems, obviously the immobilizer system is a suspect. Confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. If the immobilizer system is on,...
Question
Starter
Hello, thank you for writing in. Starting the car relies on the battery alone. If the battery is not producing the voltage and amperage needed to start the car, then the battery and the cables need to be inspected. First,...
Question
Starting
Hello, thank you for writing in. When diagnosing an issue like this, you need to take a moment to bring it back to the basics. The car needs fuel, air, and spark to run. If the engine is turning over...
Question
Neither my electronic key or car will start.
Hello, thank you for writing in. The vehicle is not getting power from the battery for one reason or another. There are several things that you can check. One being the battery cables. Make sure they are clean, dry, and...
Question
2001 Chevy s-10 truck that won't start. Lights come on but when I turn the ignition there is no noise ( grinding, clicking )
Hello, thank you for writing in. The vehicle depends on two main components for starting. Considering the starter motor is not functioning at all, you either do not have power going to it, or the motor has failed and is...
Question
I put new alternator, brought new battery crank car battery gauge do not go any further than half and start dropping while driving
You can verify alternator drive belt tension and measure charging system output at the battery posts. If the voltage output at the battery is with the required specification (roughly 13.8 to 14.4 volts but varies by model), check the condition...
Question
No power, used a working battery car won't start
Check for a failed or inadequate battery ground at the body. If the battery is used, to determine the battery's condition it must be load tested. If the battery passes a load test, confirm that the engine immobilizer system (security...
Question
2007 Dodge caravan won't start
Hello, thank you for writing in. This is a great question. The battery is solely responsible for starting the vehicle. This is assuming your connections and wires are clean, dry, and tight. Once the battery starts the vehicle, the alternator...
Question
2012 Ford Fiesta turns over multiple times then starts
You have what is referred to as a "hard start" problem. The relevant service to request, to get your issue resolved, is a hard start diagnostic. The battery is easy to rule in or out as a "cause" if a...
Question
Battery saver system car won't turn and battery good and starter. Whole dash illuminates when I turn key though, no alter
Have the battery load tested in case it was short circuited. Reverse polarity, at the battery, in a 12 volt electrical system on a car can cause a variety of effects including damaging the alternator, diodes and the numerous microprocessors...
Question
Parasitic drain 2005 tahoe on ignition a fuse
Hello, thank you for writing in. Great job on the electrical testing thus far! A wiring diagram for the vehicle will work wonders for you if you can obtain one. If you are referring to the ignition switch fuse, then...
Question
2000 ford excursion v10 altinateor replaced still not charging, can drive 45 min before battery dies and truck stops running
Hello, thank you for writing in. This is going to be a process of elimination. To start, the charging system may be having issues with the battery or the alternator. Both should be tested to make sure they are working...
Question
06,330i BMW Radio, navigation systems are not working after battery ( replaced 10 days ago), starter and alternator replacement(la
When the battery dies on a late model BMW, all sorts of things will go wrong. To begin with, trouble codes probably started piling up as the battery voltage went down before total failure. Then when the battery went flat,...
Question
Car just clicks. Tried a battery and starter and it still just clicks. Help?
Hello, thank you for writing in. Your vehicle may be having one of many issues. To begin, make sure your battery cables and the starter's cables are all clean, dry, and tight. You will then want to see if the...
Question
1999 chevy K150 suburban electrical problems
Hello, thank you for writing in. There are several components that will attribute to electrical issues like this. Generally speaking, when you have issues with several electrical systems at once, and not just one or the other, the charging system...

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