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timtheenchanter Sorry, I forgot to respond to your ebay link. Restored batteries. Empty the batteries, and wash out all the displaced paste from the bottom of the cells which cause the problems. Refill with new Sulphuric acid electrolyte at 1.270 specific gravity, and recharge at 14.7...

Sulphation is paste falling from the plates, and eventually building up in the bottom of the battery, and shorting out positive and negative plates. What patented additive can get rid of paste shorting out plates, without removing it from plates also? Where a battery has say, 6 pos and 5 neg...

Sorry Jetex, the lead acid battery is 12 volts under neutral conditions, and fully charged is virtually always 12.7 volts near as dammit when first removed from charge. Means nothing, if you can't get the current out because the plates are shot. Volts will flow through a conductive hair, but...

Without specifics about battery types Mursal, it's difficult to answer this. (i.e. NiCd / Selenium / Lithium, etc etc etc.) Dry? Most likely these are lead / acid batteries with gel, instead of liquid electrolyte. Common on smaller vehicles such as motorcycles, invalid chairs etc. Very...

If "off load" battery voltage is less than 10.5 volts, then chances are, that the battery already has one cell that has a short (positive to negative plate) and charging it, will be like putting air into a punctured tyre.

There are so many problems mentioned in these forums, with regards to battery problems, that, as a retired battery laboratory testing technician, I thought I should give some guidance on car batteries. A 12 Volt battery on a car, is 12 Volts ad infinitum (Unless completely shot!). This will...

As an ex electronics man, I've seen so many reports on this problem on here. Some of the responses have been quite amusing. I think I've cracked the problem, by suffering the same problem myself, on a 2005 Ford Focus. For a 3 volt button cell to provide the power for the electronics, the...

There are so many similar items in these forums, with regards to battery problems, that, as a retired battery laboratory testing technician, I thought I should give some guidance on car batteries. A 12 Volt battery on a car, is 12 Volts ad infinitum (Unless completely shot!). This will be 12...

A 12 Volt battery is a 12 Volt battery,..... non optional. Any less than 10.5 volts off load, and it's gonna be scrap. (I'm a retired automotive battery laboratory testing technician.) The problem of a flat battery isn't indicated by the voltage "off load", but by what happens to it ON...

As an ex battery laboratory technician, testing automotive batteries under ALL conditions, I can tell you that....... whatever your problem (about which, you have received several good suggestions) if your battery goes below 10.5 volts when it's discharged, then the chances are, that whatever...

THIS MAY APPLY TO SOME OTHER REPORTS HERE. Cold weather increases electrical resistance. Keys that work when warm, and don't work when cold? May be the same problem as this. My car: 2005 Focus, 3 button type 2 key remote. Having seen some weird answers to this problem of the remote...

My car: 2005 Focus, 3 button type 2 key remote. Having seen some weird answers to this problem of the remote locking not working, I've sorted mine out, and it is now as good as new. FORGET about "static electricity" in the control box, and other such suggestions. Rubbish! As an ex...

My car: 2005 Focus, 3 button type 2 key remote. Having seen some weird answers to this problem of the remote locking not working, I've sorted mine out, and it is now as good as new. FORGET about "static electricity" in the control box, and other such suggestions. Rubbish! As an ex...