Sinky
Posted a lot
Run Baby Run......Please!
Posts: 1,395
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Aug 19, 2011 18:27:54 GMT
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Hi Found a battery in my lock up. On the mutimeter it reads 12.49v I'm sure Iv had in my Granada but just wouldnt start it? Reads good to me but I'm just needing a second opinion please  |
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Last Edit: Aug 19, 2011 18:29:51 GMT by Sinky
2001 Volvo XC70 wagon
2003 Piaggio X9 Evo
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Aug 19, 2011 18:33:32 GMT
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its the cranking amps that start it ..not the volts ,it may read 12v but it doesnt mean the batts any good  |
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Sinky
Posted a lot
Run Baby Run......Please!
Posts: 1,395
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Aug 19, 2011 18:46:54 GMT
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Yeah thats what I thought.Is it a bin job do you think?
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2001 Volvo XC70 wagon
2003 Piaggio X9 Evo
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bortaf
Posted a lot
Posts: 4,549
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Aug 19, 2011 19:08:19 GMT
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TBH you need to drop test it to see if it's any good, a decent battery will float (sit idle) at about 13V but the real test is under load, if it stays above 12V when loaded it's ok but it could well drop to 5 or 6 V under load, thats what a drop test does, loads the battery and measures the voltage under load. On the bright side old batterys are fetching £5 to £10 a pop at the mo  |
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Last Edit: Aug 19, 2011 19:08:31 GMT by bortaf
R.I.P photobucket
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Aug 19, 2011 20:20:14 GMT
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It might just need charging.... you could always try that |
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To get a standard A40 this low, you'd have to dig a hole to put it in |
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Sinky
Posted a lot
Run Baby Run......Please!
Posts: 1,395
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Aug 19, 2011 20:48:26 GMT
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ok thanks guys on charge now
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2001 Volvo XC70 wagon
2003 Piaggio X9 Evo
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Halfords do a free battery test. Just bring the battery into your local store and ask them to test it. If it fails then you have the option to buy a new battery... hence, free test.
The reason it will sit at 12v like that is down to the fact that these batteries are always multi-cell. The little caps on the top tell you the number of cells. Once a cell fails the battery is unlikely to be able to start a car but will still show the voltage being produced by the other cells. Just if you try to draw heavy current it needs all the cells or else it won't give you enough.
There is something available called BattAid which can revive a battery which is on the turn. You need to add this with some battery top up water into the cells which have dried up. For a couple of quid you can get a battery going and working again. If it's too far gone then that trick won't work but the fact that the product is available tells you it works often enough to justify making the product.
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Just charge it up overnight and bosh it on your car, if it starts it great, if it doesnt its goosed.
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1974 Lancia Beta Saloon
1975 Mazda 929 Coupé
1986 Mazda 929 Wagon
1979 Mazda 929 Hardtop
1982 Fiat Argenta 2.0 iniezione elettronica
1977 Toyota Carina TA14
1989 Subaru 1800 Wagon
1982 Hyundai Pony 1200TL 2-dr
1985 Hyundai Pony 1200 GL
1986 Maserati 425 Biturbo
1992 Rover 214 SEi 5-dr
2000 Rover 45 V6 Club
1994 Peugeot 205 'Junior' Diesel
1988 Volvo 760 Turbodiesel Saloon
1992 Talbot Express Autosleeper Rambler
2003 Renault Laguna SPEARS OR REAPERS
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Sinky
Posted a lot
Run Baby Run......Please!
Posts: 1,395
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Aug 20, 2011 10:13:57 GMT
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Ok 15hr charge now sitting at 13.5v.
Thinking about it I'm sure Iv tried it before on the car and there was not enough power to turn it over.
Ill just go and try it now and get back to you.
Thanks for all the advice by the way.
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2001 Volvo XC70 wagon
2003 Piaggio X9 Evo
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Sinky
Posted a lot
Run Baby Run......Please!
Posts: 1,395
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Aug 20, 2011 10:51:21 GMT
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All I get is the solinoid clicking. Stuck the lights on and metered = 10v and dropping rapaid
Batteries don't last long here cause of the heat.
You have to keep topping up.
I'm back in Scotland september so Ill try and pickup some Granville Batt Aid.
Does anybody have Grandville Bat Aid tablets?Do they have a hazardous cross on the packet?
If so I will not be able to carry as hand luggage
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Last Edit: Aug 20, 2011 10:59:12 GMT by Sinky
2001 Volvo XC70 wagon
2003 Piaggio X9 Evo
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Aug 20, 2011 11:14:00 GMT
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A fully charged battery will sit at around 12.8v - a dead battery is anything below 12.2v
After you've charged a battery (at no more than 14v, 14.5v only being acceptable for a brief amount of time) it will have a "surface charge", whereby it shows a higher voltage, but doesn't have the current capacity to maintain that voltage once it's applied to a circuit
As for your battery, it sounds knackered. No amount of tablets/chemicals will help a dead battery
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You're like a crazy backyard genius! |
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bortaf
Posted a lot
Posts: 4,549
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Aug 20, 2011 12:41:39 GMT
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Here's a tip i learnt the hard way, NEVER leave a battery on the bare griound the cold will kill the charge in a few days, that's why batterys usually die in the winter, the cold is hardest on them, as the acid freezes and thickens the electrons don't flow as easyly or sumink and the voltage drops, i've seen a new battery killed in a week due to being on the floor in a garage, i allways put em on some polystyrene (sp?) i assume the opposit is true cos if you put dead batterys in a warm place they get some life back in em  |
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R.I.P photobucket
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Kai
Part of things
Posts: 276
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Aug 20, 2011 20:09:30 GMT
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You can try rejuvenating it with fresh acid and distilled. Desulphating the plates might also help, while you're at it.
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Ads 19
Posted a lot
My old r19
Posts: 1,351
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Aug 20, 2011 21:06:10 GMT
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i started my clear out my batterys, managed to find 45 that wouldn't spark a bit of wire across terminals. £390 now i'm sure i could have tried to fix some with nice charge, but at that price hardly seems worth hassle
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Aug 20, 2011 21:16:29 GMT
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I thought I had too many, think I've only got around 5 dead batteries lying around. Actually some of them might be good, typically removed from cars which had no trouble starting.
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