HOW TO REVIVE DEAD 6V, 12V BATTERIES THAT WON'T CHARGE
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- Опубликовано: 29 авг 2019
- This video is going over step by step how to revive a dead battery that wont charge using the provided charger.
Kids ride on toys usually have sealed lead acid batteries (SLA)
6 volt and 12 volt batteries can both be done using this method, just match the voltage of the battery you are reviving.
6 volts to 6 volts and 12 volts to 12 volts.
Smart chargers have built in programmes that refuse to charge batteries with voltage that's too low, so a little bit of a hack to trick the charger into playing ball is needed.
If this helps in any way, please consider a thumbs up or leave a comment.
Thanks for stopping in and be sure to check my playlists, I have something for everyone, budget tool reviews, homemade weaponry, 3d printing, and lots more.
Do not attempt to try this at home, unless you are aware of the necessary precautions that need to be taken.
very hazardous chemicals and dangerous reactions.
For educational purposes only. 
Развлечения
I had got a booster jump pack that had broken so I took the battery to find out it was completely dead. I found your video and was blown away. I didn't have any distilled water but by the grace of God it is raining here in Pennsylvania so I went out and got a cup of rain water and followed your instructions. I could not believe it worked. This battery sat after taking it out of the pack for about 2 yrs. Now it's taking a charge. Unbelievable!!!! Thank you so much!!!!
Mmm I have one of those from harbors freight and after first jump battery is completely gone. Mean it charge but deplete rights away. Was that the same issue? Cause I’m thinking of doing this to that jump start battery pack now lol
@@Oneklickmediathat's the problem this should fix. You could also buy battery acid at a local parts store for 10 bucks and carefully drain the old acid (there won't be much) then top them off with the new. In my opinion the acid is a better option but I'm far from an expert.
Have followed your video to the letter, after the failure of a ride on mower battery, and can report that it is now working perfectly. If I could I would buy you a beer and say thank you personally Many thanks
The right thing to do is to like the video and subscribe to his channel. This helps them get paid eventually. People make millions off these videos after being monetized. I can only imagine.
Of the many videos watched, this one logically explains how to safely revive, and *HOW/WHY* it works. Brilliant. Simple and methodic. 👏🏻💛
Went through the procedure with two sla batteries today. They showed 12.5v before topping up. Both took quite a lot of water. I've got them on the trickle charger now and will put them to work in a day or two. Really appreciate your clear, straightforward demo - thanks!
How'd it do? :)
It's been a while now, but as I recall it didn't work for me.@@RogerPack
Bought an electric scooter with very bad batteries and has just been collecting dust for the past 2 years....thank you so much for sharing this.
Thanks for sharing buddy... I'm a electrician have been in the trade for over 24 years and you did a good job explaining to the masses ... thanks
I appreciate that very much, there's nothing like a little pat on the back
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@@oraclescave
Appreciate for the video
I want to ask if using Purified water not distilled will cause any problem?
I used it to fill the battery thinking it's the same as distilled 😭
@Rofl it's not the best for the battery but it will still work, leave the cells open while charging back up so it can vent any bubbles.
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@@oraclescave thank you very much
I was actually looking for a way to revive my old batteries awhile back and now I came across your video. Awesome explanation on what to do my friend. Thanks for sharing.
After watching this a I took to fixing six 12V SLA batteries and have restored them and tested them for 12months and they are perfect. Thanks for posting.
I am so grateful and fortunate I came across your video. There are other people that wont pass on the same information without some kind of monetary reward as such. Thank you
No worries at all, I have loads of big money saving videos that help people keep that cash in their pocket, from changing car brakes, to rebuilding motorbike engines and lots of other things.
I like helping people, but I slso like it when people come back and let me know it helped, so thank you very much Dontae, people like you is what makes a day go good.
Much appreciated buddy
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@@oraclescave , Thankyou. I will certainly try this
. I have a 8.25kva generator, that battery has died and I have looked all over the internet for a new one and couldn't, so i will give this a go. Let you know how it goes, Cheers. Lina
I'm so happy for this video. I left my kids ride along uncharged through the winter.
Great presentation my friend. This is going to help me revive a number of scooter and UPS batteries. I did not know they were serviceable.
OC. It worked like a charm. Once I got to the cell openings and started to inject the distilled water, I realized just how "thirsty" they were. Note to all: use the syringe. If you don't, it will take a long time to fill the cells because you will be constantly waiting for air bubbles to burp. I attached a wall wart with 14 volts, 800mAmps. At first (I put it through an ammeter) there was very little (current) draw. Then it picked up. It was a few hours but my battery was not used a lot, just old. It really took off and got to the point where my (not so smart) battery charger started to give the yellow LED. (Fast charge). Power Sonic wall wart style. I am letting it "rest". I am confident it will come back full force within a day. Thank You for your video.
What a lifesaver!!!! Should have watched this before ordering new ones. 15 minutes was definitely worth 150$. You my friend are the best.
Thank you... i was 1 click away from buying a new one.
Couldnt get charged. i used a second battery for 30 minutes to get the faulty back to 11v and now the charger is working.
You saved me 70 euro.
Thanks, i will try this over the weekend when i have time. I have a few dead sealed batteries i would like to try and revive. Greetings from sunny Jamaica.
Thank you so much!
I was able to revive a (fairly new) 6v Lead Acid Battery for my grandson's ride on car. They just don't make things like they used to!
I've been using this style batter 3 for about 20 years. Sent more than I can count off for recycling. I never realized how easy they would be to open up.
Amazing Howto Video from you, ! Great walk through, in one word: quality content 💯. While watching I worked on my dead 12V Lead Battery, it's now charging. Thanks Oracle's Cave for sharing your knowledge 🙏
I got my son of Maserati Power Wheel it cuts on but he can't drive it and the sounds not playing could you help me?
We had it since march of 2021
Thank you Sir , you help me to save two almost new batteries I was ready to trash them , did every thing like you show and worked just fine . Excellent video .
Again thanks a lot
Excellent video. So very well explained. I have a salvaged 6 v battery that I cannot charge past 3 v. I just popped the top cover and saw 3 caps. They are depressed as well. I will try your method. Learned something very useful. Thank you very much and have fun.
Thanks for leaving your comment Daniel, very much appreciated Dude.
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Thank you for this awesome video I was able to revive my batteries in my wife's scooter! Great job explaining it all everything was just as you explained.
I just received 2 of these, old lead acid batteries, along with some OLD Ham Radio gear. I didn't know you could open & service them, like a larger 12V battery. Thanks, for the info., as it will come in handy real soon.
You are very welcome Chris, and thanks for commenting to let me know, I appreciate that very much.
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I play bass on the street and used YUASA 12v SLA batteries for years. Use to be (back in 2001-2003) at Maplins would cost 25 quid brand new. However, behind the Preston Road branch in Brighton there is a scrap yard. Now they had a massive collection of old SLA batteries that were used as backup power for fire and security alarms (like for banks) that were still perfect and sold for 50p. It was stipulated in the insurance that they had to be replaced every 5 years even if they were never used. This was great, I didn't even need to buy a charger. I used them to power a 25 watt car amp, had a guitar fx (Zoom GFX 707) as a pre-amp and just a speaker box. The Zoom pedal runs on 4 AAs. Thanks for the vid, never thought of opening one, I thought there might be some very dangerous caustic crap in there. Anyway, try a scrap yard if your looking for a simpler solution.
I'm reviving the batt out an old portable car charger and EVERYTHING you've said was spot on down to the dimples in the rubber caps! Got it on a 2 amp trickle charge now (for probably over night). Hope it works.
How'd it work I'm doing the same thing
Did it work?
Great video good Sir! I learned quite a bit. Thank you for taking the time.
You are very welcome FUERZA.
And thank you very much for taking the time to comment.
Much appreciated
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Thank you again! My battery was only one year old and failed in my Harbor Freight battery jumper, so I took it apart and did everything your showed. The battery went from 11.4 in 24 hours to a 12.6. My battery jumper is now like new! Thank you, thank you!!
Excellent Joel, I'm glad you managed to save it, and I really appreciate you coming back to let me know.
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What about batteries that have the connection at the bottom of the battery by the little copper tabs
@@ronaldforrest9798 0
Spot on! Liked and subscribed . Just done jumper pack part .now my charger recognised the battery (mums mobility scooter) so have 2 to do!. Had a can of IRN BRU whilst doing too! (Seriously haven’t had one for yrs. mum still stocking my childhood classic!).
Cheers again
I worked in Gallaghers Service department for 12 years from 1978 - we used similar batteries (completely closed) on solar units. These batteries would go high resistance so could not be charged by normal means... what we did was have a 2uF or 4uf 250VAC capacitor in series with mains, my case 250 VAC onto the battery - even a couple of hours would bring them back.
Many thanks! I have a few batts I'll be trying this on later this week! Cheers!!
First off, I could listen to you talk every night what a fantastic accent! I am in the USA, good ol' Alabama so I don't get to hear too many guys like you. Ok, now this method does seem too good to be true, I am hoping for the best! A neighbor threw out a new scooter I just can't pass that up so I'm hoping I can recondition the batteries. Thanks for the info!
I just payed 40 notes for a pair of 6v batterys for my kids ride on limo jeep. This is the second lot I have bought, as my wee lassie leaves her car & had not used it for a few months. But I did just bin the old ones, but I think I will be digging them out my bin. Lol. As its always handy to have a spair set. Also have to say, I watched this video, & you sound so much like the legendary Rally driver Colin McRae 😁 liked this video, my fellow Scotts Man, I'm a Glasgow Boy ✌
Yes these batteries can cost a fortune but go bad very quick if you overcharge or abandon them for too long.
They are very easy to get working again.
I'm no relation to the rally driver, but can often be seen driving around the town pretending to be him lol
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Thanks for the video, exactly what I needed to see on my first hit!
Much appreciated Jim
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Trying this too. Some are easier to open than others one I opened was very low on water. Trying this even though I ordered a new battery. I can always use a spare around my shop.
Very good video. No bullshit just common sense. Well done !
Thanks for taking the time to make and share this. The only advice I would recommend to people who try this is to put on some rubber gloves as well as eye protection. Cheers
Awesome video great info this has saved me from buying new batteries for my mom's electric scooter. Thank you so much.
Fantastic Advice, Thank you.
No problem Mick, I'm glad it helped you.
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Very good video 👍🏼 I have used distilled water from dehumidifiers
Hey - this is just great 15:45 . I run my sound system on 1/2 doz 6V SLAs and didn’t realise they could be revived like this. Thanks a lot mate.
I can't believe how much water my battery took. Wow...before it was always showing a full charge....now it's taking time to charge. thanks for this
Thank you so much Peter. I'm excited to use this to fix one of my 12V batteries that won't charge and to fix any other older batteries I come across.
I'm not Peter lol
Give it a go, you will be amazed at how many batteries actually come back to life.
Much appreciated
Darren 👍👍👍
@@oraclescave Lol Peter!
Excellent description on how to revive a dodgy battery 👌
Finally - I found the one who knows and your video did it -Wayda go there!!!
Thanks for showing and your info is very valuable. One thing you said was make sure the water was over the glass matts - Question here - by how much???
Put the water over the glass matts until it soaks in, you want to tip out the extra water above the matts, before you seal it.
The water is to help dissolve the crystals in the matt, thats all, they don't have to stay flooded like a lead acid battery.
I couldn’t stop thinking I was watching Daniel sloss. Lol great video I will have to try this if the batteries like yours are still here. Take care
Didnt even know this was possible, thank you. I have 6v battery that is fairly new (6 months or so) that will not charge. Smart charger always has a green light and battery voltage has dropped below 6v (5.8v) and it will never charge. Now i know why.
Just scamming ways companies have to make you spend money, that's why the old fashioned chargers are being fazed out.
Smart chargers are very smart for modern batteries, but completely useless when it comes to an old style battery.
And since these batteries fail very often, this trick will help you out for the remainder of your life lol
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Good to the point video. I'll be doing this tonight.
Seems like pretty simple wow great job I will try it
I'll stick with my dumb charger. It never complains. Thanks for the heads up on how finicky smart chargers are.
When it burns out, just refuse to replace it with one that says "reverse polarity protected" which is a phrase that means it will not charge a battery unless it almost doesn't need charging.
In these sealed batteries the electrolyte is supposed to be completely absorbed by the gel in the separator, so the fact there is no liquid is normal. But at the same time it is indeed the common failure mode for these to loose the water from the electrolyte over time, so they do need refill. But problem is, it is difficult to judge the correct amount, you never know how much of water is actually missing.
And to get the water really back into the gel where it will actually work needs time, so not-as-smart trickle charger left on it for a week or so will be just enough to charge the electrodes along the water diffusing back in.
That's something else to try, thanks
Thankyou so much. I’m building an electric trike and have a ton of SLA batteries but they are all dead. Will try this.
Go for it Layton, you will be surprised how easy it is to bring them back to life.
Just remember to wear eye protection and you will be up and running in no time.
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ORACLE'S CAVE Yessir. Battery acid is no good. I would have used Lipos because I have a lot of experience with them but I have boxes of the lead acid batteries that need to be used.
cheers for the info, I followed your advice, dead battery came back to life
Thanks for the information. I was in the process of doing 3 AGM's myself and figured maybe they couldn't be charged. I just did not realize the cells could be drier than I than I expected. I will go back and reopen them apply more water.
Thanks again
Thank you for sharing the video. I have quite a few batteries to get done.
You are very welcome my friend, I hope you can fix as many as possible.
Also worth checking the top PINNED comment for tips on recharging.
Let us know how you get on
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I did just as you showed in the video. The lesson I got that I had to stand the syringe straight up and dip it all the way in to prevent the air bubbles blocking the filling. Then, I synced the dead batteries with the jumpstart battery up to 8-9V and charged the batteries using the HarborFreight battery charger here (www.harborfreight.com/6v12v-2-amp-3-stage-microprocessor-controlled-automatic-battery-charger-57015.html). One 9Ah is almost full and two more waiting to be charged. From now on, I think I will recycle batteries as much as I can because they are harmful to the environment we live in. Thank you very much @ORACLE'S CAVE.
Pretty cool! I’ve been throwing those batteries away. Now, I will try this.
tried it with my 2 year dead battery... works like a charme. Many thx!
That's great Peter, and thanks for coming back to let me know, I really appreciate that.
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I have gel battery 12v200ah just 18months old na, if I charge full 12.7v with in 30min with just 50w load it drain. How do I repair it
Thanks for the video! Helped revive my battery!
Just one note about replacing the rubber caps then charging. People may not be replacing the rubber caps until after the battery is charged due to gas build up during charging.
I put the rubber caps and the plastic cover on the battery after adding water then I charged the battery. During the charging two of the rubber caps and the plastic cover shot up in the air due to the gas build up in the battery!
Yes it absolutely should be charged with no caps, I just think its funny watching them get shot all over the place, lol
@@oraclescave Hahhaha, yes I agree! 👍
Thankyou so much. Saved me a small fortune. 😌
No idea how and why this video popped up but the Timing was PERRRRFFFECT 👍
It popped up because your phone is always listening and you must have said something about charging dead batteries.
As a Postie, I have come into possession of three scooters from customers ;-) with battery issues, and a 5 million candle torch. All of the batteries need attention, and I'm hoping to use this information to get life into the batteries. Thank you.
Hey Brian, let us know how you get on, I bet you fix more than 50% of them if not 100% of them.
Remember to wear glasses, sunglasses anything that will protect your eyes from splashes, squeezing your eyes half shut is not good enough.
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@@oraclescave thank you for taking the time to reply. Hope all is well with you and your family.
@@oraclescave What's that you say? Safety squints aren't sufficiently effective? I believe AVE would argue otherwise. And he can still see!
Thanks for posting the video. Encouraged my to try to revive a dead and discontinued Sealake 33ah 12v in a Nautilus power bank someone was throwing out. $299 new , $100+ for a replacement cell. (Cdn$) Guy tossing the whole power bank thing due (inverter etc) to the battery not taking a charge. Dry as bone, we'll see how it does after a full charge. Cheers !
Excellent, I would love to hear how you get on.
It may take a few cycles.
And if "sulfation" is the cause, Google reversing the terminals.
This is a method used to reverse the "sulfation"
It basically breaks the crystals back down.
And if they don't work, all you need to add is a small amount of sulphuric acid, just Google amount for your size of cell.
I bet it works perfectly fine
Goodluck
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Very informative.Tried to use my mobility scooter after not using for about one year.When I tried charging the battery charger stayed on green but when I put back in scooter won't start or register on dial.I will try your battery recharging method and see if that works.Thanks.
I have 2 dead new batteries. I promise to never let them get low again. I still have fluid in the cells and I will check again. The first battery is charging. It went from 6.2 to 11.something in 30 minutes. The smart charger is charging it. Working on the 2nd battery and I’m positive it will be able to charge as well. THANK YOU THANK YOU THANK YOU!!!!
Thanks for this video. Really helpful.
Thanks for coming back to let me know it helped, much appreciated Frazer.
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Awesome vid. Think of all the batteries you're saving from going to the dump by posting this... good on ya, sir.
Hi, long time no see.. I remember my uncle showing me this trick with rain water when I was in my teens. Great tip, hope you are well pal,
Do u still make the coin rings?
I'm still learning how to make jewellery, that silver bar I won on your channel really helped me out alot man 🙏
Thankyou did not know about popping the tops off. Worked for me.
thanks! this was very satisfying to watch
I'll be adding rain sound to my videos too from now on - makes it massively relaxing
now I'm off to revive my car battery 🔥
Much appreciated.
It wasn't special FX, thats just what it's like in Scotland, it's like a tropical rainforest without the tropical part, lol
Thank you mate. Excellent instruction.
Remember to leave the caps off when charging, or they will pop off lol 😆
Good explanation for review of old battery sir.
This actually worked, took a few tries to get the water to soak down into the battery holes but after i filled em i shook it and i could hear the water inside. We had 2 of them that we were about to throw away and get a new one and now they both work again. Its hard to say how well they work compared to new but they work way longer then they were. The kids thought we bought new batteries
Was given two power wheels with 3 dead batteries that has been sitting for a couple years, will definitely try this.
Cheers that was very informative, I'm trying to revive 4 12v 20amph lead acid gel batteries because they are horrendously expensive. My couple of smart chargers didn't do a thing and now I know why. I got myself one of them little pulse chargers but don't hold out much hope. I'll check your channel just in case you have some tips, most of the American tubers just want to sell stuff with affiliate links and don't really explain it properly.
Thanks for this. A very big help
You are very welcome Elaine
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Thanks for the video. Battery is hooked up and taking a charge.
Excellent Geo, and if the charge wont hold very long, it will need fresh acid in the cells, can be purchased in battery refill or in a bottle, you dont need much but your battery will be back to brand new power with fresh acid, possibly get it from a car battery.
But your battery will work might just be much weaker than brand new.
Thanks for coming back to let me know, much appreciated bud.
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Well made video, just tried your trick and it worked brilliant woo woo
You are appreciated. Thanks heaps.
It's an excellent trick buddy always worth remembering
Thanks Simon, yes it's definitely worth remembering, I have thrown out loads of kids toys that cost a small fortune, before discovering this trick.
Now I rescue everything that doesn't work, it also helps me get cool stuff very cheap if it's not working.
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This is just superb, been searching for "reconditioning old nicad batteries" for a while now, and I think this has helped. Ever heard of - Ammaceen Reconditioning Rabblement - (should be on google have a look ) ? Ive heard some super things about it and my co-worker got excellent results with it.
Hi! Thanks! I have this EXACT problem. I don't have a jump start kit though. Can I hook it to my car battery? If so while it's running?
52 years old and i just learned this, the amount of batteries i've thrown out over the years and i was given a job lot of 45 amh dead batteries reviving them now with this method, i'll keep you posted
Good luck and remember they may need cycled a couple of times before they pick up.
But I bet you sort most of them
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@@oraclescave thanks mate, have 2 on the go as we speak, topped up-battery connected-fingers crossed lol, i'm a youtuber myself mate and i'll put the link on this thread when complete for the results as long as you don't mind 👍👍
Thanks, I am going to give this a go on my mobility cart Just so you know I have an old 230v to 18-volt ac transformer and connected the output to a bridge rectifier 20 amp type put that on a heatsink with fan and connected it to my 12 volts 12 amp cart battery both in parallel and run it for 2 hours and toped up the cells as needed and watched the output clime from 8 volts to 14.20 volts then let them rest as they were getting a bit hot after the 2 hours had passed I was looking at a resting voltage of 13.08 volts on both cells now I have to go back to the smart charger and will load both batteries to see how it went!! 16-06-21 if it all works it could save me £60.00 so thanks Bob in the UK
You might have to run the battery down and cycle again, maybe a couple of times.
But they should get back up and running again.
Let me know how it goes, it's always good to help someone with zero cost attached 👍👍👍
Excellent description on how to renew a dodgy battery
thank you for your video now i learn something I did not know
Worth the whole thing if you never even want a battery just for , "Bob's your Auntie" !!!
Superb vid! I'll be giving this a go tomorrow 👍🏻
@Popeye did it work like spinach? I tried spinach and that did not work.lol
@@rgwf1908 unfortunately not.
@Popeye sorry it did not work for you my friend.
Love the video, Thanks so much for the Tips.....Cheers, Thomas Hamilton, Canada
Dude awesome video I've been wondering what kind of progress I can make with all the e-bikes batteries I collected over 7 years!!! Can you imagine? I tossed 3 sets of 12 volt/20amp bat. but I still got about 12 to 15 batteries left. You know what it's raining today I can't wait to jump on this and leave another comment
Freaking amazing knowledge brother. Thank you.
Now I can put a smile on my granddaughter's face.🤗
Al-thought haven't tried it yet as in most old battery's the metal plates corrode and need replacing might work , may try it some day thanks for your video
These days, batteries have glass matt cells/plates
So the only real problem, is dissolving the crystals in the glass matt, or refreshing the electrolytes and water.
It's very hard to actually break a battery, I hope you remember this, and give it a go sometime, you will be amazed how fast you fix it.
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I have the same batteries in my mobility scooter and it's not holding a charge so I'm going to try this before paying $150 for new ones, ty so much for showing this
You can also buy battery refills, just fresh acid, much much cheaper than a new battery, all the power in a battery comes from the "electrolyte" liquid, the rest of the battery is just a jar really.
Very helpful video, thanks.
I appreciate you taking the time to say so buddy
Thanks 👍👍👍
Great video, me Scottish friend! Well done!! Thanks for sharing with us!!
Thank you very much, I'm glad it helped you.
Much appreciated
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GREAT VIDEO. RESPECT. how long do these batteries last before they need to be charged again? Are these batteries considered deep cycle batteries?
I already bought a new battery before I saw this video. Now I can try to revive the old one with the new one.
Ouch, they are very expensive, but very easy to activate after going dead.
Let me know how you get on, smart chargers are just too smart.
You will have it revived in no time with the new one.
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@@oraclescave Yeah, I successfully revived the old one. Now it is charging on the smart charger. Thanks for your tutorial.
I've been looking for a s/h mobility scooter of which there are many where the original owner is no longer alive, but the family have not kept them charged, and the batteries are dead. These are always way cheaper and now it's a good option for me to consider. £100 plus per new battery was out of the question, but the price of some distilled water and a bit of faffing about with the cells is quite within my means. Thank you v much!!!
And there is very cheap battery refill pouches with fresh acid, turns battery to brand new if my way doesn't work, very cheap. Much better than paying for new ones.
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Hi, have followed your advice all working really well. I have dropped two of the caps and cannot find them! Where can I purchase new caps. I am in the UK. Thanks Graham
Thank you so much for this video. I have 2 power packs not accepting charge. Can I disassemble safely and try to charge by your method?
Watching from the Solomon Islands, thanks for the info 🙏🙏
Beautiful place, much appreciated and hope it helps you out sometime.
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One neighbor changed a 12 volt LAWN TRACTOR that seems to die out after 1 or two years to an automotive (used junk yard good battery at half or less cost) made to fit. Works quite a long time and can jump start a car that drained overnight from a short from in seat adjuster, or dome lights on.
Thanks for making this video 👍
Much appreciated
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Great video, trying it now on my two batteries. The plastic top that you popped off at the beginning. How do you get it back on? Can I just put a couple pieces of tape