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 "used with PSU "
- Distilled water

For Safety :
use goggles and chemical gloves
don't touch the water came out the battery it's acid  

Step 1: Preparing the Battery

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 0.76 volts only. that'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's good

if not don't worry

Step 3: Mix Water With Acid and Charging

after filling the battery with the water we need to make sure it's mixed with dried acid inside the battery to reactivate it again

so first we will charge it with 12 volts DC "i'm using ATX PSU " output is 10Amps
u can use any charger 12V in maximum 9V in minimum

ok now wait 5min until u see bubbles come out from the holes.

if no bubbles come from any of 3 holes u have to reverse negative and positive and wait 1~3min At Maximum (it's Dangerous step don't leave the battery in this condition alone)
ok now u must see bubbles come out from holes too fast like boiling cut off the power immediately and reconnect  negative and positive right again


Step 4:

now pull the wasted water from the top of 3 holes by the syringe and let the battery charging
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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