diesel

iv left my car to stand for a week and now the battery has gone, it wont charge up over 11.5 volts, it will go over 11.5 when on charge but it will go back down after some time has past

iv seen in halfords you can buy replacment battery acid/water? will this work? or is it when a battery goes it goes?

any info would be great
thanks diesel

tabetha

Most likely dead, look at the plates, do they look bent twisted or broken ?
You can put in new acid to 1.280PH, but won't cure a dead battery.
A conditioner charger can often revive very sucessfully some dead batteries, the se conditioner chargers work in a different way to a steady state charger and are much better, last one I bought from LIDL for £15, only 3-4 amps but charge so quick due to the way they work, can can be left on 24/7 all year round, as it exercises the battery.
Sometimes they can be revived a bit by washing out, but hardly ever works.
If as it sounds the car is left long periods get a AGM, even fully flattened won't harm, won't cause sulphation like a std lead acid one, or other wise VARTA BLUE is the way to go.
tabetha

diesel

funny enough iv got my other charger off my mate this morning and that one i bought from LIDL,s. i put that charger on it all day when i went to work, and it seems to be holding 12.64v.
when i took it off charge about 3 hours ago it was 12.84 and droped to 12.64 in the first hour but hasn,t droped anymore.

i allways thought a charger was a charger but going off what you have said seems to be right, it wouldn,t charge up properly with my other charger.

n1 thanks for you help

tabetha

No probs matey, as you've seen a charger is not just a charger, the same type of charger as the £15 lidl conditioner charger sells for nearly £90 under a different name, even though made by same people!!
I've revived a battery that was flat for just over 1 year, didn't expect it to last, was just for getting engine started, 3 years on still going!!
tabetha

ajamesc

Best way to test a battery is with a drop tester put some amps through it that will soon tell u if its scrap! A volts meter can tell u its good all day long but a drop tester will let u know if its realy ok!

tabetha

You CANNOT drop test a flat battery, if you do it fails miserably, and is thrown away, as above when all it may need is a conditioning cycle as above.
Hundreds of "dead" batteries are binned that can be revived after failing drop test, and offer many many years of service afterwards, after having been failed.
tabetha

ajamesc

im talking about when u have charged it and its at its correct voltage! Then drop test it to see if it keeps its charge so u can tell if its going to die as soon as u start useing it as the battery is fucked

tabetha

Passing a drop test as soon as charged will not show a internal short circuit, caused by debris/broken plate material, that will flatten it over a few days, drop test gives a clue but as I said seen so many recovered by conditioning, and done years and years service afterwards.
tabetha

ajamesc

lol u must know more than daf then. As the daf procedure for dead batterys is to test it with the test equipment if the state of health is good but the state of charge is low we can re charge then test again if it comes up as good state of health and charge its then drop tested after that its tested again! if it still has good state of charge and health it gos back on the truck if not it gos in the bin!.As drop testing it puts a good load throgh the battery and shows if it can still hold its charge just because the multimeter says it has 12v in it dosent mean its a good battery i can see what your saying about dead cells but are test equipment will say dead cell replace battery if there is a problem and when u drop test if u do it will the water caps off all the cells should bubble if one dosent u know there is something wronge with that cell!

phil_rs

iTrader: (3)

Is this the sort of thing you're talking about Tabetha?

http://www.calamander.co.uk/batteryc...s/ctek3600.htm