How long before battery goes flat.

[DIZZY3]

Hi, i have a 2011 Monte 1.2 TSI, 105 I  have fitted a new battery but after about 3 days ( car parked up) the battery is flat , I know its like asking how long is a piece of string, but has any one ideas how long the car should be able to stand parked up before the battery goes flat, I am wondering if i may have something that could be draining the battery, 

Edited 27 December, 2017 by DIZZY3

[KenONeill]

@DIZZY3 - OK, not a Furbie, but my Mum's Jazz has stood for over a month and just started first pull this afternoon despite freezing overnight and ambient +2C. So I'm pretty certain it's more than 3 days!

[Toxicvrs]

Well you’ve certainly got a drain there provides battery is correct size. I’d be closing bonnet latch with bonnet open, hook an amp clamp over live feed from battery, check it goes to sleep when locked and look for excessive current draw.

[Ootohere]

Was the battery it replacing hold a charge, or was it replaced because it went flat on you?

& Do you know the new battery was fully charged before fitting, where did it come from and did the seller check it?

[rum4mo]

Ah, at last, another "battery draining" problem, what ever ended up being the root cause of last year's one in the MK1 Fabia section - maybe that member left, I seem to remember he threatened to do that!

 

I'd think that a trouble free modern car, if left unused for two months with a working battery that had previously been fully charged, would start up okay.

[DIZZY3]

Thanks everyone for replies , will get it checked out by our local auto electrician. Have a great new year to all.

[FollowingGhosts]

I've got a Mk1 Fabia, but that will sit parked for monthsand start up first time. You can at least reasonably expect a lot more than 3 days. In theory, the electronics should go into low-power mode after a period of time. (Interior lights etc. will be turned off automatically by the body computer, as well as other sensors etc. going to sleep)

 

[mrgf]

The main drain on a parked car will be alarm, clock/calendar  and then, possibly the remote blinky light. There will need to be sufficient power in the battery to open and close the central locking which can be a bummer on a flat battery. The answer though, will, on a fresh battery and a decent, well serviced car, be quite a few months. A battery will, by its own nature, slowly release its charge so even a new one, unconnected, will start to flatten over time. This will most likely be a year or so though, if it was fully charged so I would expect three months min on a good car and battery.