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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...
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...
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...
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...
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
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...
Question
My '99 Camry has been sitting in my garage for 7 months. Now it won't turn on. No dash lights, no radio, nothing. Advice?
It's not unusual for a battery to go dead when a car is parked for a long time. Modern cars draw a small amount on the battery to keep various computer memories alive, so if the car is not operated...
Question
Engine turns over but won't start. Tested the starter and it goes from 12.5v then I turn over the engine and it drops to -20v.
Hello, thank you for writing in. As a general rule, a voltage drop test on the starter solenoid should be less than 1 volt, but this will vary with age, manufacture, and fault. Your solenoid has failed. You will want...
Question
I have a 98 Toyota 4Runner and my brother put the car battery on backwards and it like had an explosion when we jump start it
Hello. When this occurs it will blow several fuses in the fuse box, it can burn some fusible links, and it can even damage the computers. I usually check and replace the fuses first and then recheck it. If the...
Question
I have a Mercedes Benz 2012 C350 coupe. I need a new battery. Should I have the car towed to the dealer?
Your car should have two batteries. One for cranking and one for operating the body accessories. If you didn't get ample warnings on the dashboard of upcoming problems, then there is something else wrong with the car. That said, as...
Question
my 2010 jeep wont start
Hello, thank you for writing in. If the battery is fully charged and the starter is receiving a full 12 volts (or at least 10), then the starter may have failed. You can test this by testing for voltage at...
Question
i am going out of town for two weeks what should i do about my car battery
Hello, thank you for writing in. Your vehicle should be fine for 2 weeks. If you think there is going to be an issue, you can disconnect the battery cables so the vehicle cannot drain it. This may reset some...
Question
2000 Nissan Maxima se making fast clicking sound. When jumped it starts left it running for about an hour turned it off now it won
You should first have the battery recharged and tested to see if it can hold a charge and load. If it fails then replace it and check the charging system to make sure it works as it should with no...
Question
Ford transit 2001 Hi, I had a short on my battery and my Transit ford does not turn on any lights. What can it be?
Hello, thank you for writing in. The short with the battery may have damaged fuses in the main fuse box. To check this, you will want to either visually inspect all of the fuses, or use a multimeter to electronically...
Question
I have a 2015 Hyundai Elantra the lights come on but the car wont start just makes a clicking noise.
It could be either; or both. But it seems the car is pretty new to be having that kind of trouble. I wonder if you may have left something turned on or installed some accessory that drained the battery. That...
Question
Idk
Hello, thank you for writing in. When a vehicle has alternator issues, the entire car is forced to run off of the battery. As you can imagine, this stresses out the battery and can cause it to prematurely fail. Start...
Question
Car won't stay charged for some reason
Claimed by Jeff Engstrom

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