Common Car Battery MISTAKES You Want To Avoid!

[@riker302011]

Where’s the fun in not being naked and covered in saltwater when swapping your battery? LOL Well done video 👍

[@glasshalffull2930]

I use a baking soda/water solution to clean the top of the battery/hold downs/terminals. This will help neutralize any acid that may be present. Always rinse with lots of water.

[@crazysquirrel9425]

Safety item with batteries - the generally produce hydrogen gas. Think Hindenberg if you are not careful. This is one reason to not smoke around batteries nor make any sparks. And wear eye protection as a rule of thumb. Another issue not mentioned adequately is the battery hold down. A loose battery can go bad early or even float around under the hood causing problems.

[@Jake90059]

Yeah the person calling you a fool doesn’t understand electrical circuits at all. I subscribed to you because that same short video you posted made sense from a course I learnt in first year uni, I was trying to figure out voltage & ampere differences that produce the same current & you nailed it.

[@tchevrier]

"voltage and ampere differences that produce the same current..." - huh???

[@Zaque-TV]

​@tchevrier give him a brake!!! 😅

[@Tom-ob8yb]

Clear as a bell. Thanks, and Merry Christmas and a Happy New Year.

[@U2WB]

I wish you had mentioned to always wear eye protection (goggles) when handling a battery. My brother used a battery-lifting strap once and it slipped off the battery - battery fell on the pavement and broke, spraying battery acid everywhere. Fortunately he didn’t get any on his face, but it burned holes in his clothing. So, definitely use caution !

[@13jorino]

For non mechanics and non experienced, this one video deserves a like. And i will subscribe. Ty

[@garymoon2829]

First timer here - a particularly good explanation, I'll check out your other videos. Thank you.

[@RJ9mech]

It's good to see someone thoroughly cover the basics. Well done!

[@13jorino]

That is for sure. This is exactly the post I needed right now. I having trouble with my battery. It looks like I just need to clean the terminals and make sure the are tightened properly. And in 5 minutes. Nothing unnecessary.

[@Joe-cu4hi]

Great tips much appreciated. I also learned years ago to give a battery jump if your car is giving the jump you put the negative clap on something other then your negative battery post or you run the risk of damaging your battery. And lastly one time my wife gave me some of her lanolin oil to smear on posts, what a great idea, i never get any corrosion on the posts

[@Sylvan_dB]

one more tip: smear a good coating of vaseline over the clean connector and battery terminal post before assembling to keep corrosion at bay.

[@Oneshot8242]

Better yet, use ProhmTect, a conductive paste. NASA and the US Navy use it. Don't know if it's still marketed.

[@Sylvan_dB]

@Oneshot8242 no, do not use a conductive paste or grease where it might spread or be contaminated by acid, etc. This connection needs protection, not enhanced.

[@roswald392]

@@Sylvan_dB NOCO NCP2 is a conductive battery corrosion protectorate paste, which SHOULD be used. It doesn't spread or get contaminated by acid. Been using this for over a decade in my shop on countless old vehicles. There are videos online that show it's proper and effective use.

[@Sylvan_dB]

@roswald392 It is a solution in search of a problem. Vaseline (petroleum jelly) has been used for a century or more and works well for almost no cost. Dielectric grease works slightly better in high temperatures, is already needed for other purposes and is still almost free and used since long before noco existed. Conductive paste on battery terminals is a product invented for the gullible to buy.

[@robertmaybeth3434]

It never hurts to just buy 2, 3 or maybe a hundred felt battery washers and hide them everywhere in your garage and trunk of your car so you have a couple when you need them. And if you forgot to fit the felt washers, but you want to, you don't even have to remove your terminal clamps just make them loose for a minute. Then just cut a slit on the felt washer, loosen the clamp, and raise up a tiny bit, and snake the felt washer under. Then just use some gasket sealer, crazy glue, elmer's glue, anything really, to glue the ends of the felt washer together again. The looks don't matter, all that matters is you get the felt washer between the post (where the corroding fumes waft out from) and the terminal clamp. Then tighten clamp again (even a scrap cut off a soda can, makes a good enough shim if the clamp is loose).

[@thecarman3693]

5:12 Great video --- I would also add that with regard to terminal connections, if you need to replace your battery make sure that you get one with proper terminal orientation. Many batteries come available with terminals on opposite sides of the battery, meaning positive and negative are reversed. So make sure that the battery you get has the orientation that works best for the car.

[@U2WB]

AAA once tried to replace my car battery and put the new one in backwards. Sparks everywhere ! It’s amazing that he didn’t fry the computer.

[@zbluebox]

One thing I learned long ago when you take your battery into a parts store to be tested is the battery needs to be properly charged first to do a proper load test. If it’s dead it will fail the load test even if it’s a good battery.

[@SilverStarHeggisist]

It also needs to not be just charged or a bad battery will show good on a load test. So like if you just drove in, I would turn the car off and leave the headlights on for about 15 to 30 seconds to get rid of the surface charge before testing.

[@RCman9291]

​@@SilverStarHeggisista load test will work even if it just came off charge if the battery is bad even without a load test u can see a bad battery most times with just a multimeter so no u dont have to drain the battery at all by the time u walk inside with it or by the time they come out it will be low enough on its own if its bad

[@ajaopify]

On touching the two poles together, I see you doing it and I don't know if batteries are different now but in the 1980's I was putting a battery in a friend's van, it wasn't a special battery at all and it was located somewhat under the rear of the driver's seat. As I was trying to get past everything including an empty propane gas container holder and the seat's lower frame, both poles of the battery touched some metal and the battery blew up and sounded like a bomb or a shotgun. luckily, my head was not directly above the battery because it blew straight up. The battery acid was atomized into the van and was a mist and my whole body started to sting. Everyone came running over to the van because of the bang. It was just a teen's play van not a camper and the battery was like any other car battery. I realize car batteries can be smaller now, like the one you show here but I've been extra careful with batteries and their poles since.

[@Behavnngroses]

I appreciate your video You makes sense No bullshit Common sense Thank You ! Your video was a blessing frfr

[@steverichdrummr]

This is actually 100% correct. Nice job, but as others have said, the baking soda/ water solution, then rinse is best. Also, battery washers and/or terminal spray protectant we not mentioned.

[@Banditt42]

Nice tip about the terminal. Another tip is if your car has one of those battery control module things like my Ford F150 has you have to reset it after installing a new battery otherwise it leads to premature failure of the battery.

[@Banyone88]

Thanks man. This video actually helped me. I was terrified of car batteries for the longest.

[@mike-oo8ok]

Clean the batter terminals and hold downs with a wire brush and a solution of baking soda and water. When it quits bubbling the acid which caused the corrosion is neutralized. A battery low on electrolyte can spark internally and cause it to explode. Sparks and batteries don't mix. Thats the reason why you should make your last connection ti metal on the engine instead of on the battery.

[@mike-oo8ok]

I forgot to add when jumping a battery

[@helenault7452]

Bonus tip that may not have been mentioned: NEVER use those felt washers that some parts stores will try to automatically upsell to you when you buy the battery. Those can force your clamp to sit too high on the post, and either cause the clamp to bottom out on the pinch without actually gripping the post correctly (as was shown in the video) or sometimes the felt washer can get pinched into the bottom of the clamp and prevent it from actually being in full contact with the post. The rationale for using those old-tech felt washers derives from the days when battery casings were made of hard rubber and sealed with tar; the battery acid could creep up along the outside of the post. The semiliquid stuff in the felt washer was intended to help maintain the seal around the battery post to slow that down. That was back in the '60s and earlier. Modern batteries don't need this, and the modern clamps can be prevented from working properly if the felt washer is installed, so just don't go there. It's not just a waste of money, it's an added problem that you can avoid by not making the mistake of buying something that went obsolete more than 50 years ago.

[@bryangreenleaf5001]

I’ve been shocked by 12 volt batteries many times. As a marine mechanic working in the summer heat in an engine room - sweating- and leaning across the engines is where this happens. It’s not pleasant but a very different “shock” than AC current, or an engines ignition coil.

[@dm9860]

I bought battery tester at harbor freight tools 👍 Checks volts, load test and alternator. Keep terminals clean, I got terminal spray from advanced auto parts, keeps from getting corrosion building up. POS cable attaches to starter, NEG cable to motor and frame .

[@johnreese3762]

Very good, honest advice/video, thanks!

[@roybatty2030]

Good video. Ensure the new battery you buy is the same physical size, electrical capacity and terminal configuration as the old one.

[@SilverStarHeggisist]

Or larger capacity as long as the size is the same, unless you're like me with a old square body that has room to squeeze way bigger batteries in.

[@comingtofull-ageinchrist6736]

I don't know about there but in Oklahoma they charge a core on batteries to encourage people to recycle them when they buy a new one!

[@erth2man]

There is usually a $5.00 core charge for no battery turned in (NY anyway). It is possible to change out a bad battery right in the parking lot of Costco or BJs and walk the old battery right back in to redeem the core charge.

[@comingtofull-ageinchrist6736]

@@erth2man that seems like the smart thing to do to me, instead of breaking the seal on a battery! In Oklahoma, you get a core charge refund for an exchange, which is what I do on all my truck or car batteries! Now the batteries I have used on some automatic standby Generac Generators for a residential homes that still have the caps you can remove to fill up the battery cells, which is part of the maintenance of the Generator, along with the Transfer Switch and any DLMs to manage loads like Dryers and A/C units and electric HVAC Heaters. Most of them have gone gas though, which reduces the need for a Digital Load Management.

[@comingtofull-ageinchrist6736]

@@erth2man I’m not sure what the core on a battery is here but I always do the swap

[@dperreno]

"Then, I do a tiny little hammer job" - grabs the bigger wrench. That's how you know he's a real mechanic! (unlike me, he at least used the handle end of the wrench! 😀) Really great video, btw. You covered all of the basics of car batteries and how to replace them quickly and efficiently.

[@jodopeg]

The Negative Battery clamp will, over time, stretch. Especially the solid lead clamps. I will drive in a steel dry wall screw into the gap between the post and the open side of the lead clamp, behind the bolt, after I've installed it. This takes up any slack and ensures a good connection.

[@kisbushcraftdownunder]

As an apprentice in the 1970s we were taught start and finish on black easy to remember

[@johnbogle6475]

Great overall advice. It's amazing how many people misunderstand these basic principals. At the beginning of the video I thought, OMG 12 volts can in no way push enough current through to kill you (or even damage you in any meaningful way). Electronics 101: Ohms law says "Volts divided by Resistance equals Current" (it's the current that kills you). I've measured resistance across my body with a FET VOM (a very sensitive Ohm meter). Dry about 500cm skin distance was in the Mega Ohms. wet... still barely in the Mega Ohm range (a metal wrench... between 0 and 4 ohms). 12 Volts divided by 1 million is 12 millionth of an amp. You most likely won't even feel it. This is only slightly more dangerous than testing a 9 Volt battery with your tongue (very wet and close proximity). That I know of, no one ever died testing 9Vs :). Overall your procedures are sound, Can you come work on my car next? :) One of the tricks I've used in the past was, mixing baking soda with Vaseline (easier if the Vaseline is hot - be careful, it IS flammable) and applying it to the terminal area after the connections are all tight. This keeps that "cauliflower" corrosion from forming :). Thanks for the great video :).

[@tchevrier]

it's not really the current that kills you. That is a phrase that is very misleading because it tends to get people to focus on the wrong thing when talking about electrical safety. Current is a dependent variable. In general the voltage is what you need to worry about.

[@lorettacaputo6997]

Is there a code that designates the position of the terminals on a battery....positive on right vs left side? Secondly, is there a coating that can be placed on cleaned terminals that will prevent formation of substances that inhibit conductivity? I remember the existence of small felt washers designed to go over the battery terminals.

[@peterhan2785]

Thank you very much for teaching me how to replace a car battery ! I obviously did everything wrong !

[@jdiguls2848]

😂😂😂😂😂😂😂

[@rockyraccoon3630]

The way I taught my kids was to never leave the negative cable alone on a battery, whether you're installing or removing one. The negative cable must never be left alone on the battery.

[@RS-vd6cs]

My Grandfather told/showed me that. I’m 72, that was 60 years ago-never forgot it! Blessings to you and yours!🙏👍

[@rockyraccoon3630]

@@RS-vd6cs Happy New Year!!

[@elizabethmariott7171]

Thank you so much!!

[@PaulMartino-i1p]

I know you stated to wear gloves but it’s always worth it to take a moment and remove all jewelry and watches before working on electrical systems. Shorting your watch or ring could spotweld the lead to the jewelry and cause burns before you can get the item off.

[@Oneshot8242]

A photo of that was shown to us on the FIRST DAY of welding school. You don't forget that! Certified TIG guy here, group W-11.

[@JaysonRay-g7q]

I put grease on my battery terminals and posts to limit exposure to moisture and oxygen. It drastically decreases oxidation.

[@davidmann2988]

Positive- first on last off. Always

[@ackmartin60]

Awesome channel. succinct and to the point. Great presentation.

[@btomas225]

Alternators rarely, if ever, "kill a battery"... Most often the mode of failure for an alternator is the inability to recharge the battery when in use. The lack of recharging will cause that battery to drain due to loads placed on the battery over time, e.g. turning on your headlights.... The battery over time will "empty" it's energy into the loads (headlights in this example) but in the case of a bad alternator, it will not be replenished with energy. As you mentioned, a good number of times a "bad alternator" is really nothing more than a bad battery terminal connection (either positive or negative).

[@ceesklumper]

If the voltage regulator inside the alternator fails, can't the cause it to overcharge (too high voltage) the battery?

[@jackievaldez4785]

Excellent! Ty 😊

[@reginaldwalton]

Start with black and end with black.

[@wmcomprev]

I have the impression that some of the newer batteries have smaller diameter posts. I've had my car for many years and have changed the battery every few years. The last time, the clamp wouldn't tighten on the post. I got out a micrometer and the new post was smaller. Not much smaller, but just enough that the cable's clamp wouldn't tighten down. They do make adapters that you can put on the post to make up the difference, but I can't think of any clamp that won't fit over the tapered post if it was slightly larger, but they definitely won't fit if the post is made smaller.

[@josimarruiz2]

If you live in a state where you need to pass inspection, make sure you use a memory saver before disconnect your positive terminal.

[@comingtofull-ageinchrist6736]

talking about a replacement battery, you need to pay attention to how the posts are situated and make sure that it will work on you car or truck! how the battery has to sit in the holder and which side the cables are on for your car! I've seen people go buy a battery and find they had to go back and exchange it for a different battery. I know in Oklahoma, some batteries are more universal and have both side posts and top post, but which side the posts are situated may be different. If that doesn't make sense, it will the first time you buy a replacement and get back only to find out you needed the posts to be opposite of what you bought! A lot of people already know this but some may need that information! I know I didn't know that back in my youth. Battery cables are made long enough to only reach one way. It isn't as easy as turning the battery when it moves the terminals too far from the cables!

[@darellsunderlin4670]

I noticed on the battery you took out that it had one of those lead caps on one of the posts . Ifound one of those on my daughters battery just yesterday . What are they for ?

[@John-jd7mm]

@6:50 After cleaning, I always smear a thin coat of high-temp grease on the post and inside of the clamp. The grease does not lessen the electrical current flow, and the connection will not re-corrode either. Wheel bearing grease works.

[@koksionglee7978]

That's some really good pointers you brought up...

[@sandor2960]

Always wear eye protection when working with batteries (and compressed air, and basically everything). The corrosion that you clean off the terminals is acidic and could get in your eye if using a wire brush, and you also don't want to breathe in that dust.

[@crimeboyish]

Never spill the contents on the floor . No one wants to be trippin' on acid .

[@rong4911]

Happens to me all the time

[@jenniferjewel4889]

So that's how that happens

[@stevenlengyel9701]

😂

[@earthlingjohn]

📌📍🧷

[@ItchyKneeSon]

When I was like 4 or 5, my mommy brought me to an auto shop. While she was talking to the staff, ADD-kid-me started exploring the lobby and soon found a rack of batteries... that had leaked battery acid all over the floor. Thinking it was water, I started to play in it. I think I may have even fallen down and got it all over me. That's about when the screaming started. I was rushed to the bathroom and rinsed in the sink. No permanent damage was done. But I still remember it 35 years later... And, no, we didn't sue. I was alright and the 80's wasn't as sue-happy as things are these days.

[@maldridge7630]

Finally, after the terminals and connectors have been cleaned and sand paper-ed down, why not use Dielectric Grease to prevent future contamination and oxidation buildup? 🤔

[@NathanielCrockett-b6n]

Never hammer a battery post!!!

[@riker302011]

But it was just a tiny little hammer job…. 😂

[@thecarman3693]

I cringed at that too.

[@artyfhartie2269]

As an aside, you can get a nasty shock if you try to pull on a spark plug when the engine is idling.

[@garfield4530]

Good video 👍

[@jamesmurray6295]

Good advice.

[@blankblank4130]

You can spray the terminals so they won't corrode.

[@scurfie2343]

I use Fluid Film.

[@shells93555]

Thank you for telling me that car batteries aren't as dangerous as i think because im scared to death thinking it will shock me so maybe now I can relax a bit...😂 Thanks!

[@shells93555]

I also like your face

[@billlindsey9337]

Good info! Liked and subscribed.

[@c.h.4814]

Circuitry aside, I personally witnessed a person making sparks while touching positive post with a metal part causing an explosion of the battery! Apparently enough fumes were present to cause an ignition!

[@fredsalter1915]

If the terminal clamp is still bottoming out (leaving no air gap) even after properly seating, there are things called battery shims made out of lead to bulk up the battery post. The look like sticks of chewing gum.

[@SilverStarHeggisist]

Can also use old tire weights by hammering them flat.

[@jeffmaron9135]

On the GEN 5 ODYSSEY you do not put the negative cable clamp all the way down as shown in your video, part of a Technical Service Bulletin shows the proper depth, which is the negative battery post top and the chassis negative cable clamp being flush at the top. This is due to partly the negative sensors that is built into negative cable clamp.

[@williamwaters4506]

The first thing I do is get my battery terminal wire brush and clean the battery terminals and the positive/negative connectors.

[@Expert51279]

All applicable to mowers as well.

[@johnzangari3432]

How dead was that battery? You should have gotten way more spark and it could have welded itself to the other terminal and possibly exploded the gasses from the sparks. The proper way is to remove the GROUND first(not all cars have negative ground). The positive post is fatter than the negative. Sparks can fly be disconnecting either terminal and if you use a long wrench, always cover the other terminal with a rag.

[@comingtofull-ageinchrist6736]

doing generator installs years ago, i made the mistake of connecting the negative first and then the positive. but if you connect the positive first and then the negative, just reverse of removing, then you can avoid a short while tightening the terminals onto the posts. I ignorantly done the opposite when doing 100's of whole house Generators until someone schooled me on that little tip, so that is definitely a great tip on removing and replacing a battery!

[@Uch123456]

It's not advised to hammer on the battery terminal, you can possibly damage some batteries that way. Instead unscrew the nut and use something like a screwdriver to pry open the battery terminal.

[@RickOsborn-q5s]

Connections to alternator get damaged because people can't figure out how to unhook the Fancy pants connector this winds up letting the connector work its way loose from the alternator then you'll start getting malfunction lights as the battery gets drained the sensors aren't getting their signal voltage show check the connector on the back of the alternator

[@comingtofull-ageinchrist6736]

you know, just as a fyi since you mentioned the acid that is in the battery, when you see corrosion around the metal where the battery sits, it is a good indication that you have a battery leaking and you should replace it asap! that is if you want to maintain that battery holder 😊

[@johnzangari3432]

That could be a result of overcharging.

[@comingtofull-ageinchrist6736]

@ or an old battery

[@BradThePitts]

Another mistake is not realizing that batteries are scheduled maintenance, just like anything else. Don't wait until it starts giving you trouble or you may get stranded. Replace a 5 year battery at 5 years and a 7 year battery at 7 years, more or less depending on usage and/or your climate.

[@Hoosier-u4w]

Is a memory saver recommended ?

[@k9under]

For newer car yes.

[@807paperclip]

5:05 It is acidic chemical coming out, not caustic. Caustic is in the higher end of pH. Think the word you were looking was corrosive chemical.

[@fredastaire6156]

No, its not. You're trying to make a distinction where there is no need for one. Caustic: "Capable of burning, corroding, dissolving, or eating away by chemical action." Having a high or low pH has nothing to do with the word he chose. Its a chemical action, which is both caustic and corrosive.

[@benjamingracian277]

get rid of the negativity stay with the positive great stuff

[@txelmore]

I would recommend you replace the word electrocute with shock, as the word electrocution would mean you die.

[@SilverStarHeggisist]

To be fair, I know people who are deathly afraid that a car battery will kill them.

[@luislopez8494]

Hi, here another tip: Positive pole is greater than negative pole. 😉

[@scottjohnson9225]

My last battery was 11 yrs. However, they are now made in Mexico or China. Hope my new one gets 5 yrs. Warranty of four years.

[@Kilnor]

What about changing the battery with the vehicle running?

[@JanaBilodeau]

terminal grease to prevent corrosion.

[@WillbarrLove]

Thnx for the helpful advice and great job with these videos it really does help

[@alasdairhamilton1574]

A lot of European car batteries are designed so that you have to remove the Pos terminal first to gain access to the Neg terminal.

[@YehNahYehAyy]

So II cant go changing 4 daisy chained batteries buttnaked covered in salt water?... What am I supposed to do on a Friday afternoon now?

[@Moondoggy1941]

How to say you live where the bus drops the kids off from school. Without saying it.

[@YehNahYehAyy]

@Moondoggy1941 Yeah until I was evicted because of the court order.

[@Moondoggy1941]

@@YehNahYehAyy Well at least you do not have to listen to all of them kids anymore.

[@YehNahYehAyy]

@Moondoggy1941 yeah hearing "daddy he's chasing me again" all the time got really annoying.

[@thedong5383]

Safe to wash the engine while both pos & neg terminals are still attached?

[@fuffoon]

Many batteries have identical twins with positive and negative poles reversed. A real pro at the autoshop can help you avoid that mistake. "That looks right" is not the way to choose. 80 models on the shelf? Let the auto parts dude check the computer and choose the right one. I was lucky to notice the pole sign before just hooking it up. Even the VIN might come with qualifiers that mean you can buy the wrong part without the additional information.

[@zippyfoo2987]

One should be cautious when sparking the battery because hydrogen builds up on the negative plates in the battery and can explode.

[@andrewwmacfadyen6958]

Car batteries can and do explode spraying acid

[@thecuss6817]

ALWAYS WEAR EYE PROTECTION WHEN WORKING NEAR A BATTERY !!! Do NOT remove a battery cable while the engine is running, can damage electronics. Such is NOT a test for charging system operation with alternator-equipped vehicles. And if you have the "emergency-only" universal terminals on your battery cables: get good cables !!!

[@randybeard6040]

Corrosion on Battery Post is Main Cause for Batteries to Lose Charge, Keep Posts Clean and Tight...

[@stevethompson8171]

What about AGM batteries, no liquid to spill.

[@stevethompson8171]

OBTW lead acid batteries are acidic, not caustic.

[@johnrodriguez1145]

Get an Odyssey battery. You won't have to worry about changing your battery for a very long time

[@tchevrier]

I used to be an automotive engineer with a large coach company. 24v electrical system. I remember once we were at a show and some feature wasn't working and I was asked to check the electrical system. I didn't have my multimeter with me, so my boss said that he would go look to borrow one. I told him no need. I stuck the wire in my mouth and touched a piece of bare metal. My boss just about passed out, and I was laughing for hours.

[@darekradulski6213]

For the last ten to fifteen at least years car batteries can’t be recharged or acid and water be added, maintenance free. Once they collapse internally have to replace them with new.

[@shadoww-px1wl]

How many years it wpuld last range? How to take care of car battery? Ty

[@dperreno]

Most car batteries last 4-6 years. Anything longer than that and you are on borrowed time. Sealed batteries (AGM) do not require any maintenance. Conventional batteries should be checked to make sure they have enough fluid in them. If you get your oil changed, the shop should be checking your battery fluid level and looking for corrosion as part of their service.

[@YoungShizzie]

I have a question I have a 04 Honda accord ex 2.4l & had it for 3 years & lights inside flicker when I start it , not a big deal but since I put in a touch screen aftermarket radio been having issues , battery died marginal came up on code reader so Midas changed the battery , a few days later on 68% idk if it’s my alternator or a short , we took the negative terminal off car stil ran & went from 14.2 volts to 13

[@SilverStarHeggisist]

You may have a alternator or grounding issue.

[@YoungShizzie]

@ so should I change my alternator ? And then what

[@erth2man]

Boiling water cleans battery corrosion with grace and ease. Either dribble a little on the terminal connections and work around them with an acid brush or dip them into a can of hot water after they are disconnected. You don't need to add baking soda or anything else, just hot water works great all by itself. This is an old trick I've used many times over the last 45 years.

[@orlypalomar]

Only thing you missed is to wear eye protection when handling lead-acid batteries. Otherwise, good advice.

[@she5152]

He failed to mention why not have sparks. I helped change a battery and crossed the wrong cable in giving a jump/sparks. The gaseous fumes from the battery exploded the battery. Solution: Don't cross up and allow the area around the battery to aerate to clear hydrogen gaseous vapors and be sure not to have leakage and loose caps. Thank God, I or others around me were not injured!

[@SilverStarHeggisist]

Those fumes are hydrogen.

[@bryangreenleaf5001]

Pro tip - never check the battery water level and using a flame as a source of light to see the water level.

[@John-jd7mm]

@2:25 "ROMOVING POSITIVE FIRST"

[@Rick-S-6063]

He actually wrote "ROMOVING POSTIVE FIRST." He left the first letter "I" out of "POSITIVE." Those errors jumped right off the screen.

[@markthomas2436]

Another thing you can do to make one last is to charge it up once a month, whether it needs it or not. The charger will go into trickle charger mode when it is full, and time ON that trickle charge will strengthen that battery. Also, do not ever let that battery go all the way down. If you do? You just shortened its life big time.

[@bobthrasher8226]

If your battery dies (you forgot to turn off the dome light) and you think it is still "good" then you should charge it first before depending on the alternator to charge it. You can wear out the alternator by using it as a charger. It is only meant to charge the battery from starting the car and light usage like lights.

[@maxenielsen]

Current does, in fact, pass through your body. It’s not enough, with a 12V battery, to stop your heart.