I have a 12V 9AH Lead Acid Battery from a motorcycle that I am wanting to charge. The plates were sulphated pretty bad, but I seem to have cleared most of it away. Initially I put 30V across the terminals with my power supply and managed to get 100mA to go through it. Now the battery is maintaining 5V to 7V after a few hours of charge from a convential charger. The battery is not going any higher than 7V at rest after a few ours on that charger. Although I have got the battery voltage up to 12V after after giving it an overcharge with my powersupply; it leveled out to 5V over night. Do you have any smart ideas that could try to treat this puppy? Thanks
When one person suffers from a delusion it is called insanity. When many people suffer from a delusion it is called religion.
It's dead. Unless you removed the plates from the case, totally cleaned eveything and replaced the acid, it's likely that you have at least one shorted cell.
Sulfation is a normal thing in a lead acid battery and basically non-reversable. There are a few tricks that can be applied to get a few more cycles out of the battery, but basically it's dead.
You can test the acid concentration with a battery hydrometer, available at most auto parts stores for a few dollars.
Lead Acid Battery
Posted - Jun 02 2007 : 09:40:41 AM
