 | Home > Technical > minimum volts for TD5 battery |
 
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971   
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by the time a battery has dropped below 12V at minimal load, there's next to nothing left in it. You might be able to start something but I wouldn't bet on much.
Engine running voltage of 14.4V means your alternator is working and charging the battery. It should stay around that even when you've got all your electrics on. Have a look on this page: http://batteryuniversity.com/learn/article..._of_charge The whole site is full of useful things, but the key table is this: 
In my opinion, a battery that's only reading 12.36V at rest isn't in a great shape, but the only way to tell for sure would be to test it. How old is the battery? Edit: I should add it's really hard to tell much about a battery just by measuring its voltage. For instance, starting with a fully charged battery if you've left your sidelights or dash cam on for ages and the battery is reading 11.9V, then it's going to be in a much worst state than if you've just tried to start the engine and it's reading 11.9V. Low current draw things allow the battery to "settle", whereas high current draw things lead to a localised dip that the battery can "recover" a bit from. |
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30th Jan 2015 11:49pm |
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| LinDens90XS Member Since: 24 Feb 2012 Location: Merseyside Posts: 83 
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Thanks for quick reply. it is still the original Delphi battery on a 2003 TD5xs. This is the first time that it has never started and I have had it since 2004 and am just coming up to 63,000. Regards
Dennis. |
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31st Jan 2015 12:03am |
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| ozzy57 Member Since: 14 Feb 2014 Location: Farnborough Posts: 221 
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An 11 year old battery? That's a rarity these days. Not many last more than 5 now.
At that age, I would certainly be preparing to change it soon. Try charging your battery, then set your minimum charge higher, Td5s are fickle beasts when it comes to a low battery. It wasn't me! |
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31st Jan 2015 7:04am |
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| JWL Member Since: 26 Oct 2011 Location: Hereford Posts: 3443  
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I count my blessings every day with mine, it was built early January 2002 and released in May of that year, I bought it at auction {sub 5k 6 years ago} and I am the second name on the logbook. It came with FSH so I know from day one what it has had done to it, the battery is original, as is the clutch, the previous owners weren't too caring, yes it was serviced etc but it was a little unloved when I got it. Those that know me know what sort of abuse it has and with 173k, 70k of that is with me, the battery has only let me down three times. Twice can be put down to leaving lights on overnight and the other followed a day on Salisbury Plain in the wet. Yes the voltage gets low this time of year, I noticed the battery monitor start at 12.4v at ignition on, down to 11.8v when glow plug circuit is active and drops to around 10v on cranking and firing. It does seem to take slightly more cranking some of these really cold mornings but that is it. I do have an auxiliary deep cycle battery but that is on a manual switch over relay and I only switch it on charge with the engine running when I remember. I probably will change it this year and to be honest I would seriously look at a take off one from a breakers.
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31st Jan 2015 11:10am |
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| dorsetsmith Member Since: 30 Oct 2011 Location: South West Posts: 4554 |
My TD5 90 HT still the original Delphi battery on a 2003 TD5 90,000  |
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31st Jan 2015 11:31am |
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| Lou Sparts Member Since: 15 Apr 2012 Location: Kent Posts: 1501 
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My Td5 is still on its original battery too, we get quite a few disco Td5s as part/x at work and many of them still have their Delphi batteries. 2005 Td5 90 XS
Steve |
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31st Jan 2015 6:48pm |
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| Cupboard Member Since: 21 Mar 2014 Location: Suffolk Posts: 2971
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Our farm '55 plate is still on its original too, and will still start if you accidentally left the farm radio on overnight which is handy.
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31st Jan 2015 11:54pm |
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| LinDens90XS Member Since: 24 Feb 2012 Location: Merseyside Posts: 83
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Thanks for all the replies. Well I was going to just replace with a Delphi but came across this adoring my search. "Delphi to Quit Battery Business - June 30, 2006|From Bloomberg News" http://articles.latimes.com/2006/jun/30/business/fi-delphi30
So it looks like I will end up using my local Motor Factors in the end. Incidentally, I have had no trouble since posting regards starting (Just hope I have not spoken to soon). Regards Dennis. |
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2nd Feb 2015 11:42pm |
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| LinDens90XS Member Since: 24 Feb 2012 Location: Merseyside Posts: 83
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Oops!! sorry for typo during my adoring search. Regards
Dennis. |
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2nd Feb 2015 11:43pm |
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| Lou Sparts Member Since: 15 Apr 2012 Location: Kent Posts: 1501
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I think Varta are the only company to make a direct replacement battery with the terminals in same place( they are in the middle of the width) not so important for us but more important for Disco two owners where the battery lead length is restricted. 2005 Td5 90 XS
Steve |
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3rd Feb 2015 7:57am |
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