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Disco 4 2nd battery
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Santa
 


Member Since: 28 Apr 2018
Location: Wilmslow
Posts: 10

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4
Disco 4 2nd battery

Why does my vehicle have another smaller battery. its a 2015 disco with eco start.
I will be unable to drive for appros three months. what is the best way to charge the battery please
Cheers John.
 ford consul written off
morris 1000 van written off
humber sceptre written off
land rover 109 sold after 4 years
land rover 12 seat station wagon new chassis after 10 years sold
discovery 2 epsom green 1999
discovery 2 xs monte carlo blue 2004
discovery 4 hse 2015
set out to buy a new disco. took one look and bought the newest disco 4 I could find.
very dissapointed land rover do not make a vehicle i want to own anymore 
 
Post #201760011th Jan 2019 5:18 pm
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RBB
 


Member Since: 19 Nov 2018
Location: Fife
Posts: 167

Scotland 2015 Discovery 4 3.0 SDV6 HSE Lux Auto Alaska WhiteDiscovery 4

Its to assist the main cranking battery with all the other hi etc bits and bobs and eco stop/start ! Best way to charge is to stick it on a trickle charger. Thumbs Up
  
Post #201760511th Jan 2019 5:34 pm
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1967jester
 


Member Since: 05 May 2010
Location: Usually in the North East though I have been known to travel
Posts: 4465

England 2015 Discovery 4 3.0 TDV6 HSE Lux Auto Fuji WhiteDiscovery 4

Smaller battery is for the stop/start system.

I use a C-Tek MSX10 for reconditioning, trickle charge etc
 Paul.

06 Java Black HSE - gone
12 Baltic Blue HSE - gone
15 Fuji HSE Lux
Club Biscuits, mmmm nice!
Traxide/Luna hybrid & Yellow top
Some Prospeed bits
+ some other stuff
Club N.E.R.D.s. 
 
Post #201760611th Jan 2019 5:34 pm
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TigerRecovery
 


Member Since: 31 May 2017
Location: Long Stratton, Norwich, Norfolk
Posts: 901

Wales 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

It's the battery for the Eco Stop Start system. The vehicle can left for 4 weeks without any issue, but I would suggest running the car if at all possible for an hour or so, to give everything a chance to turn over.
 1972 Range Rover Classic 2 door V8
2013 Land Rover Discovery 4 HSE - SCRAPPED
2016 Land Rover Discovery 4 Landmark
2022 Volvo XC40 T5 PHEV 282HP FWD 3 cylinder! 
 
Post #201760711th Jan 2019 5:35 pm
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Santa
 


Member Since: 28 Apr 2018
Location: Wilmslow
Posts: 10

United Kingdom 2015 Discovery 4 3.0 SDV6 HSE Auto Firenze RedDiscovery 4
Extra battery

Many thanks. i have the Machine mart version of the C-tek and will conect it to the big battery.
Cheers John
 ford consul written off
morris 1000 van written off
humber sceptre written off
land rover 109 sold after 4 years
land rover 12 seat station wagon new chassis after 10 years sold
discovery 2 epsom green 1999
discovery 2 xs monte carlo blue 2004
discovery 4 hse 2015
set out to buy a new disco. took one look and bought the newest disco 4 I could find.
very dissapointed land rover do not make a vehicle i want to own anymore 
 
Post #201761911th Jan 2019 5:52 pm
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Gary_P
 


Member Since: 03 May 2016
Location: Kent
Posts: 1506

Ukraine 2016 Discovery 4 3.0 SDV6 HSE Auto Corris GreyDiscovery 4

I had an issue with a failing small battery in my D4, which showed a low voltage when I tested it. When this happened the symptom was that it showed Eco stop/start not available on dash. This amaller battery keeps the various systems running (lights, heating, aircon etc etc) when stop/start stops the engine. Suspect if your battery goes flat it will show the same so you'll know.

Obviously not a good idea to let any battery go flat so put it on a trickle charge or alternatively charge it up every 2-3 weeks. As stated CTEK chargers will do a trickle charge so can be left on constant charge.

One thing to note, it is an AGM battery (at least on my car it is) like the main battery. I have on record a communication from CTEK support saying that the 'Recondition' function on AGM batteries does not do anything to help - see below:

"Thank you for your mail.
I am so happy you asked !! This is an important topic!
So, recond program is developed only for flooded batteries (including EFB), to remix the flooded acid inside.
The remixing/balancing is necessary to treat an already stratified battery, or to prevent severe stratification.
AGM or GEL batteries are not flooded, and therefore does not suffer from stratification.
That means Recond will not help AGM or GEL.
Reconding an AGM battery does not harm the battery, but does not help either, so we cannot recommend recond program on AGM batteries either.
For GEL batteries, recond can be harmful, because using too high voltage can dry the gel inside the battery and weaken the battery instead of empowering it"
 Gary
-------------------------------------------

Discovery 4 HSE 2016MY 


Last edited by Gary_P on 12th Jan 2019 12:21 am. Edited 1 time in total 
Post #201762111th Jan 2019 5:59 pm
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Ceekay
 


Member Since: 17 May 2009
Location: Bury
Posts: 2057

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Waitomo GreyDiscovery 4

Learn something new everyday Thumbs Up

Sorry to Hi-jack the post but...Don't suppose anyone has had this notice in relation to the Stop/Start;

Fault Code: B1479-73 (28)
Dual battery junction box
Mechanical Failure
Actuator is stuck closed

Ive located the actuator next to the stop/start battery but not sure if installing a new battery will cure the actuator stuck closed part or if i will actually need a new actuator.
 D4 HSE Lux MY16 Club Waitomo
D3 HSE MY06 missing her still… 
 
Post #201763511th Jan 2019 6:28 pm
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chawki212
 


Member Since: 25 Aug 2012
Location: Dubai
Posts: 7

United Arab Emirates 2014 Discovery 4 3.0 SCV6 XXV LE Auto Santorini BlackDiscovery 4

Hi Ceekay,

Did you solve the B1479-73?

Cheers
  
Post #212015811th Feb 2020 7:16 am
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Ceekay
 


Member Since: 17 May 2009
Location: Bury
Posts: 2057

United Kingdom 2016 Discovery 4 3.0 SDV6 HSE Lux Auto Waitomo GreyDiscovery 4

Had new battery and new stop / start dual battery junction box. Not sure which one solved it but changing both did the job its been fine since Thumbs Up
 D4 HSE Lux MY16 Club Waitomo
D3 HSE MY06 missing her still… 
 
Post #212021311th Feb 2020 10:43 am
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