How to Test and Replace a Bad Car Battery (COMPLETE Ultimate Guide)

Is your car battery dead? Need a new car battery? Learn how to test if your car battery is bad and how to recharge a dead car battery. Also learn which car battery is best for your car. In this video I show you how to test your car battery with a multimeter, clean corrosion from the battery terminals, test your alternator, test for a parasitic draw, load test a battery, and replace a car battery properly. I also show the inside of a car battery with a bad cell and I show how batteries work with multiple grids and how they go bad with heat, vibration and corrosion. And finally I show you the main difference between the different grades of battery and which is right for you.

Tools and Products:
DieHard Battery:
Felt Corrosion Protectors:
Battery Load Tester:
Battery maintainer:
Battery Charger:

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Due to factors beyond the control of ChrisFix, I cannot guarantee against improper use or unauthorized modifications of this information. ChrisFix assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. ChrisFix recommends safe practices when working on vehicles and or with tools seen or implied in this video. Due to factors beyond the control of ChrisFix, no information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not ChrisFix.


  1. Howie NA

    Howie NAHour ago

    ran across your YT looking for something completely unrelated to cars (actually forgot what i was looking for prior). learning what i can watching vids and this gave me some good things to check out why my car battery drains randomly. thank you!

  2. CAT thatwork

    CAT thatworkHour ago

    perfect video 11 of 10 SALUTE!! ChrisFix. new friend here from Philippines

  3. Tay Gumi

    Tay GumiHour ago

    Some modern Cars, you have to re register the speedometer to the board computer, when you cut the power and the car wont start again. I dunno if thats also the case with US Cars, I only know that my friend with its GER Car had this Problem.

  4. Matt

    MattHour ago

    What about flickering interior lights and stereo turning on and off as well as when the van is being turned off.. The dials on my gauges start moving and ticking for a little time after the car is off.... 2006 chevy uplander LT2 3.5L fwd

  5. PS

    PSHour ago

    It's more important to know know to test and charge a good battery. A bad one won't hold a charge, a good one can become discharged and then recharged, a truly dead battery won't take a charge. A chronically undercharged battery can be still good but discharged so deep that a "smart" charger can't recharge it automatically at a higher setting in 6-8 hours. If that seems to be the case and your charger hasw a low current setting, try using it overnight, then selceet a higher current.

  6. John Q

    John Q6 hours ago

    You are definitely the best on USloft. Love your vids

  7. Mokakami

    Mokakami17 hours ago

    04 Chrysler Sebring. The battery is in the front bumper right in front of the left side tire. The terminals are routed up to the engine bay but if you need to replace the battery the whole bumper needs to come off.

  8. Kenneth Kay

    Kenneth Kay21 hour ago


  9. Johnny o yo

    Johnny o yo22 hours ago

    Some intrepids and 300 m models probably others, the battery is behind the freaking fender, have to take wheel and liner out to get it

  10. jermain brown

    jermain brown22 hours ago

    Very good i love this channel

  11. Amir Karimov

    Amir KarimovDay ago

    14:53 69 F ahahahah

  12. Jonas A

    Jonas ADay ago

    One way of checking where the problem lies with regards to low charging voltage while car is charging. Clip only told that the positive cable from alternator to the battery could be bad. But it can be the negative "cable" as well. 1. Measuring low voltage with both probes on the battery. Red probe on + and black probe on -. 2. Move only the black probe from the battery to the alternators metal while still keeping the red one on the battery. If it gets good voltage you know there is a problem between metal on alternator and the negative battery pole. Move the black probe from the alternator to some good metal on the engine. If it is still good then you know the bad connection is between engine and negative battery pole. If it is the same low voltage go to next step. 3. Move the black probe back to the metal on the alternator. Now instead move the red probe from the battery to the plus terminal on the generator (shown at 17:55). If it is good then the trouble is between the plus terminal on the generator and the plus pole on the battery. The last step is shown in the clip. I just thought it missed the step 2 checking the negative connection.

  13. Jonas A

    Jonas ADay ago

    16:32 you should have used the red/pink selection (10 MegOhm Input) on the multimeter when just measuring voltage. The selection you use probably activates a load inside the multimeter so basically you are heating up the multimeter and taking power from the charger. It is not so much but right should be right.

  14. Jonas A

    Jonas ADay ago

    You can call it a multimeter. But the multimeter you show has a battery tester function that most of the multimeters do not have. The battery tester function input has a much lower input impedance so it loads the battery while testing. Though this little measuring device only loads that big battery only a little. It is probably intended for smaller batteries. Basically one could do the same with a regular multimeter. Just measure battery voltage with some load turned on like the lights for example but still have the engine off so it is not charging.

  15. David Regan

    David ReganDay ago

    ChrisFix wares a Superman costume when he does his videos! He's a SUPER FRIEND!!! When he hits 8 million SUBS he needs to ware a cool costume!

  16. Jordan Brown

    Jordan BrownDay ago

    I don’t need to replace my car’s battery. I just want to kick back and enjoy a quality ChrisFix video.

  17. David Regan

    David ReganDay ago

    AC/DC must be one of Chris's favorite bands! LOL

  18. Bipin Desai

    Bipin DesaiDay ago

    You are geniuses excellent presentation 👍👍👍👍👍

  19. curtis alan

    curtis alan2 days ago

    This battery that battery and one with the top cut off. Made it confusing for me. I'm sure a mechanic in a shop could follow however.

  20. Brandon Morgan

    Brandon Morgan2 days ago

    My battery is under the drivers side I’ve got a A190 Mercedes UK if that makes a difference with 100,000 miles on do I need to change it ?

  21. Sam Trail

    Sam Trail2 days ago


  22. Sam Trail

    Sam Trail2 days ago


  23. Wei Shen

    Wei Shen2 days ago

    My 8MR evo battery is fucked ⋯⋯

  24. Kimmie

    Kimmie2 days ago

    Thank you for this . Good info.

  25. Pharax 101

    Pharax 1012 days ago

    You're the best Chris big fan.👍🏿

  26. Tony Carranza

    Tony Carranza2 days ago

    I have a 2013 Ford Focus and the battery is tucked in far back in the drivers side. Removing it is such a pain😕

  27. joshGerbwrecked

    joshGerbwrecked2 days ago

    great videos and content ChrisFix! been enjoying and sharing your content for a while. that said you missed to comment about some of the newer more complex charging systems that require using a factory or high level scan tool to preform a 'battery reset'. basically you need to let the car know its got a brand new battery so that it can restart its very complex charging system. charging systems that now take into account more than we can imagine. Josh Gerbrecht ASE master/L1/AAS degree Automotive technology

  28. joshGerbwrecked

    joshGerbwrecked2 days ago

    shoot also what was shown in the video that you referred to as a load test is not a load test. load test literally pull hundreds of amps as if the vehicle was being started. therefore have much larger gauge wires. what is shown in your video is whats common today, a conductance test. not as good as a true load test. but harder to screw up.

  29. Mike Simonian

    Mike Simonian2 days ago

    Lol Playlist name wooder

  30. James Rochester

    James Rochester2 days ago

    Simpler method to preserve computer/alarm/radio memory is to use an OBD Memory Saver. Inexpensive device that uses 9 volt battery and plugs either into OBD port or 12 volt power supply socket (think old cigarette light looking plug) to keep electricity to these areas when battery disconnected. Use mine all the time. About $12. Google OBD memory saver. Nice video Chris.

  31. Lucas Dt

    Lucas Dt2 days ago

    2010 sebring under the bumber tires needs to come off

  32. Satujoda Srivathsav

    Satujoda Srivathsav2 days ago

    Hi Chris! I just started watching your vids and I have probably binged most of them. And to think you live so close to where I m (New Brunswick)is unreal . I got my first car like 8 months back... it’s a 2016 golf r.... kindly consider making some videos on a golf... the way you explain things is nothing short of amazing.. thank you

  33. jjacobsensnake

    jjacobsensnake3 days ago

    BMW E34 5-series, battery is under the rear bench seat! BTW, when replacing the battery you can use the charger to retain memory/power.

  34. Diablowar 84

    Diablowar 843 days ago

    For AGM batteries ; EFB would do as well...

  35. justgivemethetruth

    justgivemethetruth3 days ago

    I noticed you took the positive terminal off the battery first ... which is against every other video on USloft ... they all say removed the negative terminal first. Why does the negative terminal come off before the positive terminal? Seems like if you take off the positive terminal first, voltage is no longer applied to any part of the car, there is simply a bare positive terminal hanging in the air. Then nothing that happens on the car as long as you do not touch the positive terminal will matter. Then virtually anything that happens when taking off the negative terminal doesn't matter. You can even put that little red plastic cap from the new battery onto the old battery while you are removing it so nothing can contact it? I am going to change a battery now and do it the suggested way, but I am wondering why? I wanted to check on the Internet what is the correct way to change the battery, but I wonder why? Any wisdom on this would be appreciated. Does it really make that much difference?

  36. Fidel Lopez

    Fidel Lopez3 days ago

    Chris did all your batteries go bad at the same time lol ?😎😂

  37. flipwait

    flipwait3 days ago

    The available output arespectively switch because sundial presently grab against a devilish hammer. sad, fresh armenian

  38. XNova Blast

    XNova Blast3 days ago

    1992 Pontiac Grand Prix GTP It's located under the washer fluid tank. You have to take out the tank to access it.

  39. leon hayward

    leon hayward3 days ago

    I have a 2008 Chrysler Sebring and the battery is in the front of the driver wheel well

  40. Lucas Caros

    Lucas Caros3 days ago

    An absolute ChrisFix original

  41. jolyn g

    jolyn g3 days ago

    I wish you lived next door to me. My husband has lots of cars and mostly streetrods. He good with fixing them. But my car which is a 2006 corvette had a dead battery charger it good to go, but didn't last, so got new battery worked for a day died big time couldn't even charge it this time, so my husband put in battery from another car and we drove it to mechanic and he can't figure it out either. Never had this problem before..... Not the alternator either. And our mechanic has over 30 years experience. We are at a loss. We live in Florida, do you need a vacation????? You could stay with us!!!!!!!!

  42. Gersson B

    Gersson B3 days ago

    I love your videos bro!

  43. PauloTheKat

    PauloTheKat3 days ago

    2017 Chevy Cruze hatchback, battery is just behind the rear seats. Not the worst but a bit of a pain cause it's so far back into the trunk.

  44. Goat1 Branden

    Goat1 Branden3 days ago

    Wide body the driftstanggggg


    METALLROCK793 days ago

    So, 14.2 at the battery and 14.1 at the alternator. That is good or the alternator is bad?

  46. Can't Buy Freedom

    Can't Buy Freedom3 days ago

    You can start the car with the jumper cables and then change the batteries while the car is running.

  47. The Plane Expert10

    The Plane Expert103 days ago

    My nana had a battery from 2015 in her car in 2020 and there was a ton of corrosion.

  48. Richard Kimble II

    Richard Kimble II3 days ago

    A 2005 Dodge Stratus SXT, and it’s next to the Bumper, in front of the Wheel Well.

  49. Dimitri Morselli

    Dimitri Morselli4 days ago

    Strange place for the battery: Alfa Romeo GTV (916) for weight distribution, in the front of the trunk behind of some upholstery ( hold in place with the plastic plugs that always break) over the fuel tank, under a non removable panel with very little room to spare and very little room for access, and where you can't see what you're doing it's a nightmare really... but the car has a 50-50 weight distribution, and as centered as possible, so slightly better handling, it's difficult to explain how uncomfortable that place is without seeing it, go look it up and have pity in me ps: really cool affordable car that Americans don't know

  50. Kloko Loko

    Kloko Loko4 days ago

    ALSO you need to know that lead metal is toxic, especially compounds of lead inside that battery. Also acid have dissolved PbSO4 salt in it, so it's contaminated with lead. Just to know.

  51. SYSTEM_EDITOR.1995

    SYSTEM_EDITOR.19954 days ago

    Isn't battery acid actually a "Base" (opposite of acid) because it's an alkaline? Or is that just household batteries?

  52. Heavy Metal

    Heavy Metal4 days ago

    You CAN use a Multimeter to conduct a load test. Set the multimeter to Volts DC, connect to the battery terminals and crank the engine. If the initial reading is a fully charged battery (12.6V) but under cranking the voltage drops below 10V then the battery is lacking in CCA’s and should be replaced.

  53. Heavy Metal

    Heavy Metal4 days ago

    Some modern cars do charge up to 15.1 Volts

  54. Heavy Metal

    Heavy Metal4 days ago

    Some STOP/START cars also can take an EFB or Enhanced Flooded Battery rather than an AGM.

  55. Morgan Keller

    Morgan Keller4 days ago

    I got question i got a ford fusion and it wont start turn over no lights on dash. I though it was a bad battery do you know what else it could be nothing is coming on at all?

  56. ars tamu

    ars tamu4 days ago

    Thank you very much Sir, informative video. Great work.

  57. Juan Youtube

    Juan Youtube4 days ago

    Weird question but would coke cola work?

  58. NIK

    NIK4 days ago

    hi, Chris, I need a suggestion. Every now and then my card doesn't want to start. I have to charge the battery from another battery only then it works. The car is fairly new around 6 months. Any suggestion should I replace the battery or there is some other problem. There are some more problems like even when you turn off the car the engine still hummed until turned back on and off. AC doesn't work on the first go had to switch off and on again.

  59. NIK

    NIK4 days ago

    @Heavy Metal ok sir

  60. Heavy Metal

    Heavy Metal4 days ago

    Go back to the dealer to inspect and repair under warranty

  61. Chris Bragdon

    Chris Bragdon4 days ago

    Hey, when you disconnect the battery, do the negative side first!! When you reconnect install the positive side first!!!

  62. Roberto

    Roberto4 days ago

    That platinum battery is for a tractor

  63. Mark Nagel

    Mark Nagel4 days ago

    Hi Chris, might want to surprise your dad with a new driveway. He'll love it and your videos will present better.

  64. paul pepe

    paul pepe4 days ago

    Thanks for the tip to keep the power supplied during battery change. Never seen that done before.

  65. ChrisFix

    ChrisFix4 days ago

    No problem! I know some people dont have their radio code and it creates a mess haha.

  66. hotdogbuns255

    hotdogbuns2554 days ago

    This man does a lot of shopping at Advance Auto it seems 🤔

  67. hotdogbuns255

    hotdogbuns2552 days ago

    @ChrisFix No shame in that. I work there haha

  68. ChrisFix

    ChrisFix4 days ago

    It is only a few min from my house and I work on cars a lot so... haha

  69. Joe Sib Cars

    Joe Sib Cars4 days ago

    In my 2002 Volvo V70 my Battery was in the Trunk and to get to the battery you have to Lift up the Floor And remove the spare wheel Cover then you will see the Spare wheel and the battery was on the Left next to the Spare tyre and to remove the battery cover I had to losen a 13 MM bolt and 2 13 mm Nuts then I had to remove the Bracket then I removed the battery cover then I losened the Negative Battery Terminal then the Positive terminal then I had to remove the 12 mm bolt for the Battery hold down then I was able to remove the Battery I removed it because I was installing Reverse Sensors and I had to remove the Spare tyre because I was removing the rear bumper but you don't need to remove the Spare tyre to replace the battery and my 2002 Volvo is Right hand drive because I live in the Uk and I've owned that car since August 2012 And the thing I like about this car is no one really thinks about buying one but there good Cars Have you ever Driven one of these cars before if you have Driven one they don't have a Good Turning Circle but that's the only design Fault Take care From Joe Sib Cars

  70. Jesse Dagandan

    Jesse Dagandan5 days ago

    chris i need your advice my car will start but after 1minute it quit and when start again it wont start. i check the batt. is 12.8 v i need your advice what to do

  71. Jesse Dagandan

    Jesse Dagandan5 days ago

    thank you so much chris i love your presentation and it helps me so much to fix my car battery. God Bless You and More Power to you.

  72. John-Patrick Kinerk

    John-Patrick Kinerk5 days ago

    If you want to test the alternator itself, but it's not accessible when running, can you place the positive probe on the positive cable connection and the negative probe to a chassis ground? Will that isolate the alternator's current the same way? Thanks, great video!

  73. Tyler Smith

    Tyler Smith5 days ago

    Hey @chrisfix so my Subaru Outback (2004) has a pioneer radio put in and when i replaced the battery and didn’t do what you did with the mustang the car Still had all the presets and the computer didn’t reset either. Do you know why I keep trying to research but nothing come up. Or if anyone else wants to help me out please do. Ps love the videos Chrisfix

  74. FlowRain Records

    FlowRain Records5 days ago

    on a VW touareg the battery is under the driver's seat... wtf

  75. DarcvexiS

    DarcvexiS5 days ago

    Walmart will give you cash back on the spot for an old car battery.

  76. Steven Walker

    Steven Walker3 days ago

    Advance does too. 10$ for old batteries

  77. Jon Hudson

    Jon Hudson5 days ago

    why did you not use the 9v battery method instead of the jumper cable?

  78. Kash Patel

    Kash Patel5 days ago

    Chris excellent demonstration and attention to detail, keep the videos coming !!

  79. nunya nunya

    nunya nunya5 days ago

    2015 gmc acadia its in the back seat under the carpet

  80. Kenny Powers

    Kenny Powers5 days ago

    i dont understand the battery shorting explanation why wouldn't both sides spark?

  81. Flynフ

    Flynフ5 days ago

    Have you ever change the battery while engine running?

  82. GTAVince

    GTAVince5 days ago

    Iemand enig idee waar je die DieHard Battery Accessories Terminal Protectors & Grease in Nederland kunt kopen?

  83. Erik Brice Ledford

    Erik Brice Ledford6 days ago

    Y’all this is the most IMPORTANT youtuber there is

  84. King Freedom

    King Freedom6 days ago

    hey how can i get that terminal connect

  85. shaun wilson

    shaun wilson6 days ago

    Nice job . 1st rule I learned was to make sure the keys are not in the car .. some lock when a new one is fitted .

  86. ethan moir

    ethan moir6 days ago

    Fun battery location '91 BMW 735i under the rear bench seat. Such a big battery it had to be wiggled out. Complete pain, even the regular mechanics complained about it.

  87. Craig Venables

    Craig Venables6 days ago

    Amazing thankyou

  88. Matt Bates

    Matt Bates6 days ago

    2013-2019 Ford Escape Battery - Requires wiper arm removal, brake fluid reservoir to be detached, requires cowling to be removed. It's placed behind the windshield lol. Did this for a buddy's wife.

  89. Alex Labanino

    Alex Labanino6 days ago

    Yes, replacing a battery is easy unless you have a bloody Dodge Journey! 😉

  90. izzy garbo

    izzy garbo6 days ago

    Best pratice if you are changing your own battery is clean battery case out with baking soda to neutralise any battery acid. Dry it off before installing new battery. I perfer 2 coats if battery tetminal sealnt sprays over the silicone. Had one car that within a month silicone on battery terminals were covered in dust.

  91. Gustav J.

    Gustav J.6 days ago

    These batteries definitely weren't staged. :)

  92. LeeYenHua Gaming

    LeeYenHua Gaming6 days ago

    You can just jump start the engine and change it normally and the things will not reset.

  93. izzy garbo

    izzy garbo6 days ago

    Why on brand new Hondas do the batteties fie after only 2 years. Both of my new CRV'S & my sons new Accord died after 2 years. I clean the batteries twice & year with baking soda and spray on 2 coatings of battery sealant or whatever its called. Replacement batteries lasted 4 to 5 years.

  94. Mahdee Arif

    Mahdee Arif6 days ago

    In my Corolla 2013 Hybrid, What's the location of the 12V battery? Chassis Code is- NKE165.

  95. Volodymyr Zakolodyazhny

    Volodymyr Zakolodyazhny6 days ago

    "If it is damaged or corrosive", and shows a car cleaned like cat's balls and looks like new. :-)


    AEOOOON6 days ago

    Love the perfectionism in your videos, both in terms of content but also with editing. I've watched this channel from the very beginning, don't own a car, but I've probably watched half the videos - I really want to buy a car to just work on it at this point :D

  97. Rayz Videoz

    Rayz Videoz6 days ago

    I was sad like litteraly crying hearing him say "hey guys' idont know why it cheered me up

  98. Madison Scott

    Madison Scott6 days ago

    Replace car battery??? This is for ignorant I revive my battery each time and it is OK for another 3 years

  99. Joker135 smiley

    Joker135 smiley6 days ago

    2005 Buick LeSabre the battery is under the backseat

  100. Birki gts

    Birki gts6 days ago

    What causes batteries to fail in extreme cold?

  101. Dr. Thermostat

    Dr. Thermostat6 days ago

    2012 Ford Focus SE The battery is located half in open air where it’s accessible in the engine bay, and the other half, which I believe has the negative side, is under the driver side lip trim (under where the AC air intake is located) where it’s virtually inaccessible without removing the battery from the vehicle altogether. Good ol European Ford quirks

  102. TM

    TM6 days ago

    "wooder" on music

  103. TM

    TM6 days ago

    i love chris fix video because he also teaches the science behind it edit: wow i learn something i didnet learn from school. agm is more durable and require for start/stop tech

  104. ACK MY BACK

    ACK MY BACK6 days ago

    Trickle chargers are just life support for batteries

  105. iLife64

    iLife646 days ago

    I had an 00 Lesabre, took me 30 minutes to figure out it was under the rear bench

  106. Seth Pigman

    Seth Pigman6 days ago

    I've heard some battery's are under the seats

  107. Zhenren Zhou

    Zhenren Zhou6 days ago

    On an actual High Mobility Multipurpose Wheeled Vehicle, the 2 heavy Hawker batters are sitting right underneath the passenger/TC seat. They are connected in series to make at least 24 volts and the cold cranking amp on each battery should be 1250.

  108. riskinhos

    riskinhos6 days ago

    do you know why car batteries are the most recyclable item in the world? because they are worth money. that's why.