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+--- Thread: Official battery testing technique!? (/showthread.php?tid=27289)
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Official battery testing technique!? - Tom - 19-10-2014
Is there a way i can test a battery so i can be 100% sure it is perfect? I know the AA have a computer thing that can calulate a batterys cca which is impressive but how can i check a battery to that extent at home? Obviously i can check its at 12.6 volts but that doesnt seem like a good check to me... Then theres load testing... Are those 2 enough to confirm a batterys health?
Basically i have a starting issue, where i think the engine is cranking right at that borderline starting speed where it starts but it just doesnt start the first rotation of the engine and i think either the battery or starter are to blame, car is 10years old so maybe its at the end of the second batterys life?
RE: Official battery testing technique!? - Niall - 19-10-2014
All you can do is check the battery voltage when the car is being cranked.
Id say if its dropping near/below 10, its had it.
Also, I've got one of them testers which i use at work. All it does is simulate a load over a set period of time and calculates remaining AH based on that. They aren't overly accurate.
RE: Official battery testing technique!? - Tom - 19-10-2014
Well i just went out and put the meter on it, 12.50/12.49... The cars been sat for about 4 hours locked now and not driven today, wont be able to crank and check for a drop til tomorrow now, unless i attempt it in the dark :/ sod it im going to have a go!
Dropped 12.2 with ignition on and then 10when cranking and came back up to 11 then started. Cranked for a good 3seconds before it started which was nice.
RE: Official battery testing technique!? - Tom - 19-10-2014
There is SO much contraversy on this subject, cant find a solid answer anywhere online, some say 9.6 and its shot others say 10.5, some say the headlights are a high load lol. What a faff, a new battery is a tidy 100quid and i dont want to blow that for almost no reason
Official battery testing technique!? - rocker8742 - 19-10-2014
Got a spare battery lying around? Link the 2 with some jump leads and see if its any better?
RE: Official battery testing technique!? - eskimogod - 19-10-2014
lot of places will check your battery for free altho the answer they give might be slightly biased given most places that do the testing sell them.. but im ever so slightly cynical
RE: Official battery testing technique!? - Tom - 20-10-2014
Going to pop in halfords later and see if my mate down there has access to a tester :/ anyone else have an opinion on my current battery?
RE: Official battery testing technique!? - Piggy - 20-10-2014
Stick ya tonque across it
Most garages like quickfit will do a free battery test, its just a simple gauge that puts load on the battery and shows if its any good
RE: Official battery testing technique!? - Toms306 - 20-10-2014
Must have a long tongue Piggy...
Tom, your battery does sound low tbh, assuming it's the same as the Golf battery they're massive to cope with turning over a heavy engine, bigger starter than a 306, heating the glow plugs and the extra electrical load items (yes, even headlights are a heavy load btw).
RE: Official battery testing technique!? - Eeyore - 20-10-2014
If youre going to get a new one make sure you get a bosch silver line. Never had any problems and i believe you can take them back and get them replaced no questions asked!
RE: Official battery testing technique!? - Niall - 20-10-2014
Halfords don't do the bosch silver lines anymore. They are using Yuasa silvers as a premium battery which are still great. We use Yuasa stuff all the time at work and it's spot on most of the time.
RE: Official battery testing technique!? - Tom - 20-10-2014
Yuasa os what i have now, bloody great 5year one.
RE: Official battery testing technique!? - Toms306 - 20-10-2014
How old is it? Probably 5 years and a month, that's usually when guarantee'd items fail.
RE: Official battery testing technique!? - Niall - 20-10-2014
My bosch failed at 4yrs 10 months. Lucky of what! Lol
RE: Official battery testing technique!? - Tom - 20-10-2014
No way to know how old it is...
RE: Official battery testing technique!? - Niall - 20-10-2014
If it's a Yuasa, there's a 6-8 digit code stamped on the top somewhere. Take a pic and I'll tell you how old it js.
RE: Official battery testing technique!? - Tom - 20-10-2014
5 050694 030529
Thats the number on the barcode, no nimber stamped on the top...
Heres a curve ball, halfords yuasa battery tester said the battery is A ok i didnt get a good look at the screen but the chap said its spose to have 760 and its got 846 i assume he means amps, surely that cant be right lol!?
RE: Official battery testing technique!? - Toms306 - 20-10-2014
Sounds right for cold cranking amps tbh! Hmm, are all terminals tight, inc the starter ones?
RE: Official battery testing technique!? - Niall - 20-10-2014
That's one of their old style stamps and I haven't got the sheet for them but it's either 2006 or 2005 in pretty sure :/
RE: Official battery testing technique!? - Tom - 20-10-2014
The cars a 54 though! Surely thats not the original audi one??
RE: Official battery testing technique!? - Toms306 - 20-10-2014
It'll be stamped/stickered with the VAG logo if its original...blue Golf was still on the original at 10 years old...
RE: Official battery testing technique!? - Tom - 20-10-2014
Dont think its original then! Its yuasa branded
RE: Official battery testing technique!? - Toms306 - 20-10-2014
Cant remember what brand they used tbh, probably whoever did them the best deal at the time, think it was Varta in the Golf but Audi might've spent a bit more.
But if it's very obviously a normal Yuasa them it's not the original, originals were black with the brand written in tiny white writing and the VAG part number scrawled across the top lol.
RE: Official battery testing technique!? - Tom - 20-10-2014
Definately not oem then. Hmm. Not sure what to do now. Its more of a cold start issue and my cold starts are at 3am and i dont want to be f*cking around at that time lol.
Official battery testing technique!? - rocker8742 - 21-10-2014
Did you try hooking it up to another battery?
RE: Official battery testing technique!? - Tom - 05-11-2014
It still does this every morning, it doesnt do it every start so its hard to know if the jump pack is helping. I have tried it twice with the jump pack attached to the battery and it has started better. Now i think of it, i will charge up the jump pack and try it tomorrow morning!
RE: Official battery testing technique!? - Tom - 06-11-2014
Started better this morning with jump pack and that was at 4am. Hmm. Will try again when i finish work and see what happens. Its looking more and more like a weak battery.
RE: Official battery testing technique!? - darrenjlobb - 06-11-2014
Surely you can tell if the battery is down....It will motor faster / better with a jump pack vs without...
RE: Official battery testing technique!? - Ruan - 06-11-2014
Lol yeah...
If you really want to know, get a drop tester on it.. Those shitty little computerised things are crap, unless she's shoving out 500a+ you'll never know whether it's really working properly.
RE: Official battery testing technique!? - darrenjlobb - 06-11-2014
I just fail to see the point in battery testers, its fairly obvious if a battery is good, or if a battery is getting old / bad....