Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 907
Battery life in a car park?
Seat of the pants calculations here. Car battery is 100Ah, quiescent current is <30mA.
100/30ma = 3333 hours = 138 days
BUT....that would reduce the power in the battery to zero.
How long in practice might my car last in a car park and still start when I get back to it. Assume battery is in good condition and fully charged when I left it. No electrical add ons to add to the current drain.
I'm expecting to be away for about three weeks. is there any hope?D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 2012 SDV6 XS - Stolen
D4 2014 SDV6 HSE - Shiny
17th Jan 2016 10:04 pm
Down&Dirty
Member Since: 17 Aug 2012
Location: Somewhere out back
Posts: 1292
I left mine parked at the airport for for 3.5 weeks last January, got back to it late at night big frozen lump,started first time
And just about to do it again next wk. MY24 Defender 90 X-Dynamic HSE
MY18 Disco 5 HSE Santorini Black Now Gone.
17th Jan 2016 10:13 pm
Fitzy73
Member Since: 09 Feb 2014
Location: Truro
Posts: 2407
I have been able to leave previous cars for three weeks and they have always started (2 litre petrol & 2.2 diesel), but from things I have read on here, I would be a little less confident in leaving my Discovery that long as they seem to be sensitive to their batteries.Andy
17th Jan 2016 10:18 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
I parked up for the night but didn't get back to the D3 for around 4 months and winter had set in.
It started on first go but ran very rough for the first few minutes.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 907
Four months?! Way to go Robbie and His Car!
I used to leave the old Td5 for what seemed like indefinitely and it always started on the button. Never tested it beyond ten weeks though. Seems like the D4 might be made of the same sterling starting stuff. I'll let you know.D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 2012 SDV6 XS - Stolen
D4 2014 SDV6 HSE - Shiny
17th Jan 2016 10:45 pm
Robbie
Member Since: 05 Feb 2006
Location: ¯\_(ツ)_/¯
Posts: 17932
When you draw small currents from a battery the available capacity increases as Peukert’s Law is in your favour. If you increase the rate of discharge the available capacity decreases.
Land Rover - Turning Drivers into Mechanics Since 1948
Member Since: 20 Dec 2009
Location: oldbury West Midlands
Posts: 1212
Try leaving a solar trickle charger on the dash
17th Jan 2016 11:14 pm
Davethegeo
Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 907
I was going to ask about solar chargers. I'm a bit cynical about them having seen the quality of one or two. There are some that plug into the OBD socket. Any good anyone?
Mind you, Peukert's law is working in my favour.D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 2012 SDV6 XS - Stolen
D4 2014 SDV6 HSE - Shiny
17th Jan 2016 11:35 pm
zinke
Member Since: 22 Feb 2014
Location: Scunthorpe
Posts: 584
We use solar panels on eBay (£15-20 type) designed to keep your car battery topped up to run electric fences, they work well over a long period of time so think they would work. The other thing to do is have a smaller car battery (55 amp ish) in the boot and jump cables just in case, that's what I did for a few days when my battery started to die (always happens on a Friday of a bank holiday)
Pete.IID, webasto software and workshop facility's available.
18th Jan 2016 12:10 am
lespes
Member Since: 17 Sep 2009
Location: Sitting Down
Posts: 2232
My D4 was left for 7 weeks last year in airport, no problems!D4 Landmark MY16 Santorini Black THE LAST
D4 HSE MY12 Marmais Teal: Gone. Missed a lot!
Freelander 2 SD HSE MY11 Silver:Thankfully gone.
D4 HSE MY11 Silver: Gone missed !
Range Rover Sport MY06 HSE Buck Blue: Gone missed!
Discovery D2 TD5 Facelift MY Red Gone Missed!
Discovery D2 TD5 Cobalt Blue: Gone Missed!
Discovery D1 Auto Oxford Blue Not missed at all!
Discovery D1 Avalon Blue First LR! missed!
Now demoted to a VW
18th Jan 2016 12:17 pm
T2BTK
Member Since: 27 Aug 2014
Location: Emigrated (again)
Posts: 182
3 weeks......mine will do that with new battery fully C-Tek charged
But you could load a spare battery fully charged & use this to boost your start upBREXIT - done properly.
Right now ...We need Government - not Politics
Save the Dipstick Flagbearer-keep it simple, less likely to fail campaign-agenda items:Starting Handles, Acetylene Lamps.
Founder: Dipsticks-R-Us Inc
D3 HSE-perfectly formed, passenger friendly...has real DIPSTICK
Jag XK-but sadly no DIPSTICK...HUGE design fault
FL2 has DIPSTICK..."real comfort in rear seats"
VW Golf wondermobile (?)..has real DIPSTICK
Morris Minor..original DIPSTICK technology..and a real KEY.
18th Jan 2016 11:08 pm
Davethegeo
Member Since: 01 Oct 2015
Location: Edinburgh
Posts: 907
I have just collected my car from the car park where it has been sitting, unattended and uncared for for three weeks during what the media would have us believe was the latest Little Ice Age.
Walked up to the car, clicked the fob, all doors unlocked. Loaded bags, got in and started the engine. No dramas whatsoever. There was however quite a bang as I drove away as the brake pads relinquished their unauthorised grip on the disks. Apart from that there was no need to worry.
Before driving away I peeked under the car for oil and other fluid leaks - habit from having D2s in the past. The ground was dry. Huh? Is this car even a Land Rover?
Quietly impressed. The D4 is a stonking car.D1 300Tdi - gone
D2 Td5 ES (Alive remapped...mmm) - sadly gone
D4 2012 SDV6 XS - Stolen
D4 2014 SDV6 HSE - Shiny
23rd Jan 2016 8:25 pm
DSL Keeper of the wheelie bin
Member Since: 11 May 2006
Location: Off again! :-)
Posts: 72921
Remember if it's not leaking/marking its territory it'll have run out.
23rd Jan 2016 8:27 pm
euangibson
Member Since: 24 Dec 2010
Location: Borders
Posts: 11027
Mine was goosed after a week in the airport car park....I can only assume the Blackvue was the culprit.
I don't think the battery was in top condition before I left it so possibly not a great example.....
http://www.disco3.co.uk/forum/topic135993.html?highlight=Dampener"Better to remain silent and be thought a fool,than to speak out and remove all doubt" ?.....what rubbish...
Locking rear E-diff
RLD spare wheel protector & sump guard
Extended roof rails
Series 111 mudflaps
Black side tubes,grill and vents
Timed climate remote
Hids4u interior lights
D4 Firenze my2012 HSE
D3 Java 2005 SE manual (sold,sadly,thanks for the memories)
1966 '88 Series 2a....still starts in the morning better than I do...
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