how to recondition batteries

Walt Barr shows you all the steps to test and recondition automotive lead/acid batteries on one video.

how to recondition batteries

how to how to recondition batteries for

iphone 8 plus battery draining fast all of a sudden
By Eslam Eldeknawy in WorkshopEnergy


the 1 last update 2020/07/12 137137

Introduction: Bring Dead Lead Acid Battery to Live Again

to day we will learn how to bring dead sealed lead acid battery to live again
this method i tried with alot of dead and expired batteries and 90% of them back to work again

P.S : this method may be not bring the battery to full performance of the original condition but at my rate  the battery will work for 50%~70% of it.

you need :

- 3cm syringe
- voltmeter or multimeter
- battery charger or power supply
- crocodile cords ""
- Distilled water

For Safety :
use goggles and chemical gloves
don''s acid  

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Step 1: Preparing the Battery

how to recondition batteries 👍how to how to recondition batteries for in sealed battery we will find cover on the top of the battery
just remove it by little flat screw driver like photo
when finish we will find 3 holes covered by rubber caps
now we have to remove this caps too.
ok now we will measure volts of this battery
on my battery it''s mean the battery is completely dry from inside

Step 2: Fill the Water Inside the Battery

we need in this step to fill the battery with Distilled water to activate the acid again
so refill it by syringe few time until the water come out from all holes  and measure the voltage
u will find it increased by mVolts
that''t worry

Step 3: Mix Water With Acid and Charging

after filling the battery with the water we need to make sure it''s Dangerous step don''t cover holes until it charge to 6.9V u should check it every 1 hour

then dry it out by tissue and cover every thing

Congratulations ur battery is working again

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sorry about my bad english!!

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    39 Discussions


    Question 2 years ago

    Which is considered as waste water in the filled battery ?


    for 1 last update 2020/07/12 QuestionQuestion 2 years ago

    Can you help me with this?

    Vic pisano

    how to recondition batteries 🔴how to how to recondition batteries for 2 years ago

    after restoring the 1 last update 2020/07/12 battery ,can it be kept if not in use?after restoring battery ,can it be kept if not in use?


    5 years ago on Introduction

    I tried this method with copmpletely DRY 12 V/7A batttery.(No liquid inside). Before trying I measured 0,46V from battery. Then I filled all cells with only distilled water(no acid used). Then remeasured: 0,34V. Next I tried to charge the battery by a China made recharger, but it is mcu controlled and did not charge. So I tried to charge it with an adaptor. But again no charge. Because there is only distilled water inside battery and distilled water is pure, no minerals inside, and it is a strong water-resistant. I think to start desulphate battery fiilling only with distilled water is not good idea. there must be an electric flow through poles, but it is impossible when using only distilled water


    Reply 2 years ago

    You must mix Epson Salts with Distilled Water, as it''s probably not water, but the charger itself that''ll need somewhere around 19-20V to kickstart the process.

    how to recondition batteries 🔥how to how to recondition batteries for There is a technique for lead-acid restoration using pulse-charging. Basically it is the same thing, but instead of reversing the voltage it continuously feeds high intensity pulses to break through corroded layers of Pb.


    3 years ago

    hey guys. i have 12V SLA battery and it wasn''ve to battery +''s not charging more than 1V...ways a problem...


    3 years ago

    Can we revive battery with for 1 last update 2020/07/12 no continuity? Can we revive battery with no continuity?


    3 years ago

    how to recondition batteries 🔥how to how to recondition batteries for *****VERY IMPORTANT READ BEFORE GETTING EXCITED***** *****SAFETY*SAFETY*SAFETY*SAFETY*SAFETY*SAFETY*****

    **************PERSONAL for 1 last update 2020/07/12 PROTECTIVE EQUIPMENT****************************PERSONAL PROTECTIVE EQUIPMENT**************

    You''t had any problems and I use second hand batteries and second hand batteries are so cheap now that it isn''re pretty broke desperate and already have the tools you need. Playing with acids is also pretty dangerous for your health and can cause severe respiratory problems and nasty deep burns so try to do this outside where there is open air. Have a garden hose next to you on standby or a full bucket of water just incase you get it on your face or eyes so you can flush it away. Try not to inhale acid fumes because you could end up paying for it later. But like I said if you have no other option and you have the tools then go for it. P.S. paper respiratory masks will not help because they build up harmful toxins because they are really only for dust and mild organic fumes if that. Use a real carbon filter mask and fully closed eye goggles when handling acids and wear full cover clothing and apron ($5 cheap disposable apron) and fully closed shoes in case of spills and skin contact. If you have any battery acid contact your protective clothing just simply remove your clothing and place in trash "" or leave it near kids or pets and shower immediately and do not rub your face and eyes until you have thoroughly wash your hands. This ideas of fixing batteries is really great but also remember safety. Sometimes it''s just a good second hand battery. Personally I rather not inhale battery acid fumes or get it on my skin or eyes but when your desperate maybe look up some safe operating procedures before you become ill or injured! Nothings simple but safety is paramount but unfortunately third world countries tend not to waste any time or money on safety because it doesn''ll be glad you did


    3 years ago

    Persiverance+your guide+new charger = restored battery

    The Honda battery is now holding an almost full charge, roughly 90-95% but good enough for me. Had to replace the original charger as it failed to power up. After further investigation it turns out the new charger can only charge batteries between 20Ah to 50Ah max so anything below this and the charger thinks the battery has failed and cuts the charge.

    Battery charged up, connected up 2 20W hallogen bulbs and both are still bright 20mins later a big thank you, Eslam Eldeknawy

    Eslam Eldeknawy

    Reply 3 years ago

    how to recondition batteries 🔥how to how to recondition batteries for happy to hear that :)
    good luck


    3 years ago

    does this method work on 12v 200AH sealed Batteries?

    Eslam Eldeknawy

    Reply 3 years ago

    give it a try if you have no way to fix it
    but don't charge on more than 20 amps charger


    3 years ago

    I must say, this is without a doubt the best method to reconditioning batteries available. I have tried some methods in the past but none of them worked.

    Anyway, thanks for the help.