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ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4731
Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue
Flat battery protection?
"A friend of mine" accidentally left the ignition on overnight whilst charging his iPhone and laptop - unfortunately the blower motor was also on Thud so when he tried to start up there was absolutely nothing. Not a peep. Fortunately my... err... "friend" has 2 batteries (Odysseys) so the vehicle started on the second one.

So my question is: are the Puma electronics sensible enough to cut the power (e.g. to the blower) when the battery voltage falls below a certain level or is the battery just drained until coma?

Cheers
Matt Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...
Post #325985 25th Apr 2014 1:01pm
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munch90



Member Since: 26 Oct 2013
Location: guildford
Posts: 3558
England 
don't think there is a protection device , but maybe relays would disconnect (not enough voltage to work coil in relay ) when voltage drops

maybe there is in side control modules like engine ecu , alarm ecu
Post #325987 25th Apr 2014 1:13pm
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smb



Member Since: 15 Jan 2013
Location: Cheshire
Posts: 1232
United Kingdom 2011 Defender 110 Puma 2.4 XS CSW Santorini Black
There are devices you can install that will disconnect all power if it senses low voltage. This is to enable a single start to get you out of trouble.

I have the same with two Odysseys and have installed the IBS DBS Battery Monitor system with the added Booster Relay AND LBP180 Battery Protection. Have tried running the main battery flat and it all works perfectly by taking the starting power from the second battery.

See here(if the link works):
http://ibs-tech.ch/en/products/dual-batter...uproc.html

I think you can buy this system from TBR if in the UK.
Post #325991 25th Apr 2014 1:25pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610
United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
At a quick glance something like this perhaps. But isn't that one of the functions of the ignition? You have to weigh up the odds of actually needing one I suppose?

http://uk.rs-online.com/web/p/monitoring-relays/3216860/ If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #325996 25th Apr 2014 2:26pm
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Cupboard



Member Since: 21 Mar 2014
Location: Suffolk
Posts: 2971
United Kingdom 2011 Defender 110 Puma 2.4 HT Corris Grey
Has your, err, friend, considered charging his phone and laptop from his second (non starter) battery to avoid this from happening?
Post #325999 25th Apr 2014 2:39pm
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bpman



Member Since: 21 May 2008
Location: Oslo
Posts: 8069
2008 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black
Matt,

your "friend" is really stupid, maybe tell him/her to put the defender in tha garage, lock the garage, and give the keys to his other half Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter Rolling with laughter
Post #326028 25th Apr 2014 5:33pm
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PaulMc



Member Since: 17 Jan 2009
Location: Kent
Posts: 501
United Kingdom 1989 Defender 110 2.5 TD HT Arles Blue
Have a look at -

http://www.noflatbatteries.com/

. Paul.
1989 Arles Blue 2.5TD 110 Hardtop
1999 Epsom Green Discovery II 4.0 V8i 'XS'
Post #326036 25th Apr 2014 6:14pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367
United Kingdom 
Matt are you sure it wasn't you. Whistle
Post #326057 25th Apr 2014 7:41pm
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ZeDefender



Member Since: 15 Sep 2011
Location: Munich
Posts: 4731
Germany 2011 Defender 110 Puma 2.4 SW Baltic Blue
Embarassed Embarassed Embarassed

Paul, that looks great. Idiot -proof (just what I need) Whistle

Thanks all. I've been using the vehicle all day with no problems - started fine after only 1/2 hour charging on the move, so I guess that means I... er I mean "my friend" hasn't completely crippled the main battery Wink Tell someone you love them today because life is short.
But shout it at them in German because life is also terrifying and confusing...
Post #326095 25th Apr 2014 9:02pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 20367
United Kingdom 
Just nearly screwed it up. Whistle Rolling with laughter
Post #326101 25th Apr 2014 9:13pm
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