Battery Flat Over Night

sumotan · Post by **sumotan** » Sun Jan 31, 2021 1:41 pm

Hi Gents,
Wonder if anyone ever experienced this & if so what could be the problem & where to check. Car is running fine & never had
this issue was driving it yesterday all was well. Battery renewed 5 months ago. Nothing was left switched on confirmed when
I got into the car using key fob.

As always many thanks

maxman · Post by **maxman** » Sun Jan 31, 2021 2:52 pm

It’s probably down to a lot of short journeys with all or most electrics on and cold spell .I would give the battery a full charge and see how it goes.

mr.tourette · Post by **mr.tourette** » Sun Jan 31, 2021 3:40 pm

they do seem to still sip a fair bit of juice in sleep mode, seems to be the way with modern cars nowadays that run a canbus multiple modules and ecu's, couple this with the recent cold snaps and a few short journeys and its not long until they are running a little low on voltage

sumotan · Post by **sumotan** » Sun Jan 31, 2021 4:59 pm

Thanks Gents,
I was driving the car yesterday & all was fine & in general I would take the car out for a drive every alternate day.
So strange as this is the first time that it happened with no signs or whatsoever.

Cheers

mr.tourette · Post by **mr.tourette** » Sun Jan 31, 2021 7:10 pm

sumotan wrote: ↑Sun Jan 31, 2021 4:59 pm Thanks Gents,
I was driving the car yesterday & all was fine & in general I would take the car out for a drive every alternate day.
So strange as this is the first time that it happened with no signs or whatsoever.

Cheers

Did you do a voltage check? even running it every other day if you have the heated seats on and blowers going full belt to warm up the cabin add in daylight running lights and all the modules requiring power you could end up supping more juice out the battery than you're putting back in on a run slowly reducing it each time.
Even on my daily merc i top up the battery once or twice through winter to help with the cold weather and power hungry electrics draining away voltage

Ed.Straker · Post by **Ed.Straker** » Sun Jan 31, 2021 10:45 pm

sumotan wrote: ↑Sun Jan 31, 2021 1:41 pm Hi Gents,
Wonder if anyone ever experienced this & if so what could be the problem & where to check. Car is running fine & never had
this issue was driving it yesterday all was well. Battery renewed 5 months ago. Nothing was left switched on confirmed when
I got into the car using key fob.

As always many thanks

Was the new battery registered?

sumotan · Post by **sumotan** » Mon Feb 01, 2021 1:14 am

Thank you again Gents, will do a battery check from now on. Yes battery was registered.

EdButler · Post by **EdButler** » Thu Feb 04, 2021 8:25 pm

Have you got any aftermarket electrics in the car such as chargers, USB adapter, Bluetooth, Stereo, dashcam? A few friends who have experienced parasitic drain often find it's one of those.

Best way to check is to remove fuses and bridge each point with an ammeter to see if any current is being drawn.

Smartbear · Post by **Smartbear** » Thu Feb 04, 2021 8:28 pm

How long are the journeys you give the car every couple of days? If they’re only short the charging system may not put back the energy taken in starting the engine

Rob

Ole gits rule · Post by **Ole gits rule** » Fri Feb 05, 2021 12:13 am

Smartbear wrote: ↑Thu Feb 04, 2021 8:28 pm How long are the journeys you give the car every couple of days? If they’re only short the charging system may not put back the energy taken in starting the engine
Rob

That is my biggest issue right now, very short journeys every two or three days, bought this https://www.ebay.co.uk/itm/Automatic-In ... 2749.l2649 to put some charge back in to the battery and it seems to be working ok right now.

sumotan · Post by **sumotan** » Sun Feb 07, 2021 9:38 am

Hi Gents,
Sorted out the problem, you wouldn't believe it, it's the battery & it's only 6 months old !!!!!!! You charge it full leave it over night & voltage just drops to 6 volts or so. Owned a couple of cars over the years & have not once experienced battries that died in just a coupe of months. Sigh.

Many thanks again Gents

mr.tourette · Post by **mr.tourette** » Sun Feb 07, 2021 12:25 pm

sumotan wrote: ↑Sun Feb 07, 2021 9:38 am Hi Gents,
Sorted out the problem, you wouldn't believe it, it's the battery & it's only 6 months old !!!!!!! You charge it full leave it over night & voltage just drops to 6 volts or so. Owned a couple of cars over the years & have not once experienced battries that died in just a coupe of months. Sigh.

Many thanks again Gents

Yeah unfortunately you do get the odd new battery that just seems to die, at least you are hopefully able to get a warranty replacement as only six months old?

flybobbie · Post by **flybobbie** » Sun Feb 07, 2021 7:20 pm

This battery spends most of it's time..flat.

: 71274506_10157390412747412_4569288987499298816_n.jpg (63.49 KiB) Viewed 826 times

sumotan · Post by **sumotan** » Tue Feb 09, 2021 12:36 pm

Lol Fylbobbie.
Yes rather unfortunate to have a bad experience, my other car with battery from India is far far more reliable.

mcbutler · Post by **mcbutler** » Sun Feb 14, 2021 4:46 pm

I frequently leave my zeeee for weeks on end, no trickle chargers etc and no problems at all. I have a clip on voltage meter which I used when I first got it to check battery V drop over time and it was virtually nothing.
If your going flat quickly either your battery is teets up or you have a drain somewhere.

Z4-forum.com

Z4-forum.com