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johncorrisgrey

Member Since: 17 Apr 2023
Location: south yorkshire
Posts: 11

flat battery and CTEK charger

Hi all

110 XS D300 6 months old. Locked for 3 days then unlocked on key and flat battery. Land rover assist thinks last update left key system permanently searching for a key. Has anyone else experienced this.

Also decided to put CTEK charger on to give battery a good recycle but CTEK will not charge green ! light starts flashing.
CTEK now happily charging Honda S2000. Anyone else using a CTEK or any other charger?

Thanks John

14th Jul 2024 8:22pm

Chicken Drumstick

Member Since: 17 Aug 2020
Location: Near MK
Posts: 707

What do you mean flashing? Flashing an error or something else? My charger flashes the green full charge light when the battery is fully charged and cycling.

14th Jul 2024 9:14pm

johncorrisgrey

Member Since: 17 Apr 2023
Location: south yorkshire
Posts: 11

no amber lights on the scale showed at all, then the green light started to flash. Never seen that before, would have expected it to go at least to some kind of charge.
John

14th Jul 2024 9:23pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 17310

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

Very few intelligent chargers will charge a totally flat battery, but if you can get some.charge in with a dumb charger then the ctek should be fine. It's just a characteristic of this type of charger, it has to be able to recognise that it is connected to a battery.

14th Jul 2024 11:23pm

julian

Member Since: 17 Feb 2017
Location: Devon
Posts: 93

1994 Defender 110 300 Tdi CSW Alpine White

Re: flat battery and CTEK charger

johncorrisgrey wrote:
Hi all

110 XS D300 6 months old. Locked for 3 days then unlocked on key and flat battery. Land rover assist thinks last update left key system permanently searching for a key. Has anyone else experienced this.

Also decided to put CTEK charger on to give battery a good recycle but CTEK will not charge green ! light starts flashing.
CTEK now happily charging Honda S2000. Anyone else using a CTEK or any other charger?

Thanks John

As mentioned, they won't charge an under voltage battery.

You can trick them by connecting them up to a good battery, getting them charging it, and connecting your dead battery with jump leads (in parallel) and then, after a few mins, removing the good battery, without pressing any buttons on the charger.

14th Jul 2024 11:40pm

zilch

Member Since: 11 Sep 2019
Location: Whitsundays & Sydney
Posts: 811

I just returned from a 8 week break in Europe and had to recharge the battery,
our CTEK M7.0 fully charged it over 8 hours.. used it a few times without any hassle yet another pommie bar steward down under

MY20 110 P400 SE Defender
MY10 3.0 RR Sport

15th Jul 2024 1:23am

Chicken Drumstick

Member Since: 17 Aug 2020
Location: Near MK
Posts: 707

blackwolf wrote:
Very few intelligent chargers will charge a totally flat battery, but if you can get some.charge in with a dumb charger then the ctek should be fine. It's just a characteristic of this type of charger, it has to be able to recognise that it is connected to a battery.

We will have to wait for the op to confirm. But it doesn’t sound like a completely flat battery in their op.

15th Jul 2024 6:21am

johncorrisgrey

Member Since: 17 Apr 2023
Location: south yorkshire
Posts: 11

thanks for your suggestions,

battery was at least 70% land rover assist guy got it started and we let it tick over for at least 1 hour, in that time battery state went up from 20% to 70.

when he left I put the CTEK on to leave it over night but then saw the symptoms as described, panicked and disconnected straight away

May try it again later today, going out for 25mile round trip, if starts?

Just been browsing and looking at NOCO lithium charger/starter,(model to do D300 about £109) we are on the continent for 5 weeks from end of July and will be most miffed if it continues to play up.

Waiting for dealer to get back to see if they can fit me in for a check up.

John

15th Jul 2024 11:26am

mlambton

Member Since: 20 Apr 2024
Location: Devon
Posts: 22

Those NOCO jump packs are excellent. Ive had one for a couple of years and its helped me and my neighbours out so many times. 2024 L663 110 Defender P400e Carpathian Grey
2015 Range Rover L405 SDV8 AB Corris grey
2010 Range Rover TDV6 HSE Narra Bronze sold
2006 Discovery 3 SE green sold
Defender 90 td5 sold
Defender 90 soft top sold

15th Jul 2024 11:42am

JonathanP

Member Since: 01 Jun 2024
Location: Barnard Castle
Posts: 22

1998 Defender 90 300 Tdi SW Caledonian Blue

If you are charging using the jump start connectors under the bonnet just jiggle the crocodile clips a bit to make sure they are in full contact with the two posts especially the red one (positive) in the plastic box it makes a better contact. The plastic box makes it a little bit more difficult to get a good connection depending on the angle.

23rd Jul 2024 9:54am

johncorrisgrey

Member Since: 17 Apr 2023
Location: south yorkshire
Posts: 11

well flat battery again today think its a separate issue with tow bar not deploying, gonna put a post on for that, contacted original dealer and heard nothing back from them!!! so going into dealership Ive used for years previously. Eventually settled for a RING lithium power pack and separate battery charger only because they have 10% off direct from them, free post and 2 year warranty.

John

23rd Jul 2024 7:10pm

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