Member Since: 03 May 2016
Location: Kent
Posts: 1519
Hi
Did you connect the negative battery lead to the chassis rather than the battery terminal?
CheersGary
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Discovery 4 HSE 2016MY
12th Feb 2021 7:16 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Hi there
Yes, I have the comfort lead connected up. Live to terminal and negative to a body earth, the same one as the battery.Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
12th Feb 2021 9:45 pm
Gary_P
Member Since: 03 May 2016
Location: Kent
Posts: 1519
Thanks for confirming. That is strange. It seems that this is not an uncommon issue. I wonder if anyone has any theories?
CheersGary
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Discovery 4 HSE 2016MY
12th Feb 2021 9:49 pm
ronp
Member Since: 29 Nov 2006
Location: North Yorkshire
Posts: 15213
Well, just came across this article in pistonheads.
Seems I’m not the only one to experience the battery draining problem.
At least that’s proof it’s NOT the D4, but the issue lies with the Ctek mxs7
Thankfully the mxs7 gives a 5 year warranty ...... will be getting in touch with them.
🏴
13th Feb 2021 10:58 am
robpenrose
Member Since: 12 Jan 2016
Location: Surrey / SW London
Posts: 2136
Ive had no issues with the MXS5. I gave mine a little charge last weekend.
Current: D4 HSE
Previous: BMW Z4M Coupe
Previous: Land Rover Defender 90 CSW Td5
Previous: Land Rover Discovery Td5 ES
13th Feb 2021 11:10 am
Geoff at Drym
Member Since: 18 May 2015
Location: Cornwall
Posts: 584
I had a Ctek charger. It had a two year guarantee. At two and a half years (out of guarantee) its electronics went haywire and it overcharged my tractor battery. Battery completely knackered. I had used it only a few times, so not impressed. Now gone back to my old (ten year old) Halfords charger, Max charge 6 amp, trickle 1 - 2 amp. Its charging rate lowers as the battery charges and then trickles to keep the battery topped up. Have left it connected and charging my MX5 for days at a time with no ill effects and a topped up battery.
As you may guess, I am not a great fan of modern electronics. Yeah, I know, I run a D3. None of us are perfect! 2007 Disco3 2.7 tdv6 SE
gvif with reversing camera
V8 brakes with new EPB module and shoes
Later D4 grille
Alive tuning remap
Mazda MX5
Ferguson ted20 tractor
Hyundai Getz 1.4 (wife's )
Last edited by Geoff at Drym on 15th Feb 2021 12:33 pm. Edited 1 time in total
13th Feb 2021 12:43 pm
400-ascona
Member Since: 05 Apr 2019
Location: Derby
Posts: 20
The main AGM battery of my 2016 D4 (16k miles) let me down Friday. First time I had to go into the office in months. Jumped in the D4 and wouldn't start. Stuck it on charge, walked to work (everything else is on SORN and tucked away!). When I got home, took the D4 shopping and a reasonable run. Stuck it back on charge overnight. Next morning, wouldn't start. Checked the battery with a volt meter..... 11.8V. That just wont be enough!
Eurocarparts - £182 for Exide AGM.
Not tried to see if it starts today
14th Feb 2021 1:40 pm
B16 KJR
Member Since: 10 Jul 2006
Location: Rosyth, Fife
Posts: 3005
Charged mine up through the towing socket as normal, but only got 12.6v showing at the battery when measured with a volt meter. Connected the Ctek +VE directly to the battery and the negative to an earth point on the inner wing and then got 14.7v measured at the battery, so for some strange reason the charging voltage was being lost from the towing socket to the battery, as 12.6v is never going to charge the battery.
14th Feb 2021 2:58 pm
Trailered Movements
Member Since: 16 Jan 2020
Location: East/West Sussex Coast Borders
Posts: 1198
Had a 24v Ctek mounted on my truck chassis, never had a problem rain or shine, but after 5 years of doing it's thing, died after being used overnight when frosty.
I believe it was as a result of condensation internally.
Dave2011 Discovery 4 Commercial SDV6 (Gone)
2010 RRS TDV8 (Gone)
1980 OBLIC 4.0ltr Range Rover (went a long time ago)
14th Feb 2021 3:13 pm
charlietortoise
Member Since: 29 Oct 2011
Location: Staffordshire
Posts: 502
Tester
Just wondering if anyone has experience of one of these low cost battery testers. I thought it would be handy to check up my battery condition after my c teck charge and before I get the usual 'low battery' warning
Discovery 4 3.0 HSE 2010 year. I like it a lot. Now with winch 😂
26th Feb 2021 11:16 am
Famousfive
Member Since: 12 Aug 2014
Location: Southampton
Posts: 1806
NJSS wrote:
CAUTION: MY14 vehicles and later with Stop/Start have an additional battery fitted; the implications of this for the hard reset technique are not fully understood
Hopefully there is something for battery reset procedure for the D4 elsewhere? Failing which is the hard reset technique now fully understood?
NJSS
Hi Nigel - the IID for stop-starts has a reset secondary battery function
2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.
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