Reviving a dead car battery (lead acid)

Fill up with tap water and use variac voltage upto 20v~30v until battery voltage reads 12v
electrolysis will happen and water becomes acid ...do this for 10~15min..

Category:

Science & Technology

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• hho

[sakcheegii]

maybe i can put hydroxy water?

[dreamyear]

yes...that will work too

[celltechlars]

For old battery in junk car. I put 2 spoons of crushed ice into each hole and even a little beach-sand might be good too. Then I boil 1 liter of pool water and about a mouthful of Listerine or diet Pepsy in it. Pour hot from pan onto crushed ice/beach sand in battery holes until full to the top.

Then I hook it up to ark-welder on medium setting. Just let the stick weld against battery post so you get nice strong humming sound. The earth goes on negative post. Let it hum for 5 days. Like new !!

[halseyM]

Don't use TAP water if you intend to keep the battery as minerals fur up the plates & makes recharge capacity worse. Use DE-IONISED WATER

[doktorandom]

A good charge voltage is 13.8V

[demnlordd666]

using water & forcing electricity through it only works if it completly discharged normally, b/c all the sulphuric acid is locked into the plates as PbSO4, using clean water and charging it you make the acid + Pb + PbO plates, but if fused you are always gonna have a low charge, you cant clean plates that don't operate as a pair because they r shorted together w/o over leaching others badly --> over precipitation of excess lead & shorts. good luck

[WECB640]

I want to thank the imbeciles for their comments. The fodder was entertaining.

[g7txu]

This bloke clearly knows shit

[mikemotorbikeca]

he means, have a container of water sitting there already; and then pour acid onto the water. Not the other way around, this way is recognized as much safer as it will not explode in your face.

[da1stegr]

Looks super cool man.

[imanulsofian]

Nice work. This is almost exactly the way I used to experiment with dead battery years ago. Just be careful yourself, those battery can explode even though there's no source of fire or spark around.

[mofaraider]

Tonight I reanimated the original Battery of my 1975 Kwasaki Ke125. I flushed the Battery for around 20 minutes under warm tab water. I flushed all the lead mud out of it and refilled it with accid, Now it slowly gains power again, i think its really impressive that such an old Battery acutally works again :-) Great Video by the way.