Battery Drain in Disco - D2A

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Originally Posted by KEV0044

Hi Tim :)
My Dad's been sick lately so haven't done any long trips since the June long weekend with Redback and Yorkie .
So the disco has only done a few short local trips over the past few months .
Do you think this has contributed to the condition of the battery ?
Thank's .

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yep and andys got it spot on on the numbers for the current draw. From memory I think the battery in the disco is only good for about 95Ah as a reserve capacity.

Hi Kev, that’s the prob and it’s a simple solution. Hook up a battery charger and give the battery a good charge and if the disco is not going to be driven much for a while, about every two weeks charge the battery again.

The battery can hold enough power to start the disco for well over a month, but leaving batteries for that length of time will eventually short the life span, charging the battery two weeks or so will keep the battery not only fully charged but in good nick.

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Originally Posted by AndyRevill

A current draw of 0.38A = 9A in 24hrs = 190A in 21 days??? or am I missing something?

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Correct,i must have been dreaming.......

OK,so looking at this calculation,wouldnt the battery be too flat to start the car??
Or is my meter reading incorrect?

Hi Scarry, sure your reading wasn’t 0.038, as this would be about spot on.

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Originally Posted by scarry

Correct,i must have been dreaming.......

OK,so looking at this calculation,wouldnt the battery be too flat to start the car??
Or is my meter reading incorrect?

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yep, but that calculation assumes that the vehicle never went to sleep. lets just say it was someones wireless router that was causing the security system to stay "awake" and have a high current draw but they turned it off when they werent home or asleep then you dont have the higher current drain on all of the time.

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Originally Posted by Bearman

Kev, I dont know a lot about discos, but I do know that if you have an ERPS (electronic rust prevention system ) installed this does happen. I have one in my 110 county and if I dont start it for over 2 weeks the battery is low. They say that they dont draw much power but it is enough to lower the voltage over a couple of weeks. Regards....Brian

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Yeah this happened to me, I have an ERPS on mine, and when I left it for a couple weeks my battery was flat. Then I noticed that at times, when leaving the battery for a week, the ERPS would flash a red light meaning it was losing power. So when I went on a 5 week overseas trip I simply unclipped the ERPS from the battery. When I came back its started first time.

Cheers,
Randy

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Originally Posted by drivesafe

Hi Scarry, sure your reading wasn’t 0.038, as this would be about spot on.

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no,definitely .38.went up to around 1.2 when the interior lights came on.I was thinking,as i opened the door to release the bonnet catch,maybe this triggered something & it wasnt totally asleep,also it wasnt locked.

I will leave the bonnet open & unlocked o/night & see what it reads in the morning.I am reading the negative wire from the battery,as there are to many positive wires & they are difficult to get to.

I often leave my D2 TD5 for 4 to 5 weeks without turning it over and no problems...? It does not even sound slow turning it over
cheers
Nobby

I guess we are all asumming the battery was 100% charged when the car was originally stopped!!! and the battery doesn't have a dead plate or 2 Cheers Ean

There was a post here a while back about an electricity usage monitor in a meter box, like a Cent a Meter, causing a Range Rover battery to go flat.