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tow bar
by G Walker - 24/08/26 06:52 PM
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Jun 14th, 2026
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Joined: Apr 2008
Posts: 12,255 Likes: 317
Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
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Posts: 12,255 Likes: 317 |
Update: 4 December 20
I haven't used Tarka for 8 or 9 days. When I parked the battery voltage was 12.6v.
Today it was 12.3v
So, I'm beginning to believe that the battery I had was faulty: this on holds its charge.
When it is at 12v I'll either drive the car or put the charger on.
Is there a reason why you don't simply leave the car hooked up to the battery conditioner when you put it in the garage? Mine's on all the time when I'm not using it.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Formerly known as Aldermog Member of the Inner Circle
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OP
Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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Joined: Jul 2007
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Member of the Inner Circle
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Member of the Inner Circle
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JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: May 2010
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Needs to Get Out More!
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Needs to Get Out More!
Joined: May 2010
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I have only done 1300 miles over the last year (MOT mileages). Covid put the brakes on over the last 9 months but the Ctek has been used plus running the engine at 2 week intervals. No starting problems even with the “ageing” Odyssey battery. I need to put some miles in to keep the brakes/suspension moving.
Plus Four MY23 Furka Rouge
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Joined: Apr 2008
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Scruffy Oik Member of the Inner Circle
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Scruffy Oik Member of the Inner Circle
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Fair enough. I have a connector plumbed in permanently so it's just a question of plugging in the charger when I get out of the car, takes just a few seconds.
Tim H.
1986 4/4 VVTi Sport, 2002 LR Defender, 2022 Mini Cooper SE
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Joined: Nov 2015
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Just barreling along Needs to Get Out More!
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Just barreling along Needs to Get Out More!
Joined: Nov 2015
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Peter your post prompted me to check mine
The Roadster is the late model with BCU, immobiliser & other potential electrickery, has not been on charge for a couple of weeks & shows 12.41v
The over 70yr old F Super shows 12.73v perhaps a credit to simple wiring
Jon M
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Charter Member
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Charter Member
Joined: Oct 2019
Posts: 5,586 Likes: 603 |
No doubt battery experts may disagree but I work on battery voltages (battery rested after either charge or significant discharge)
12.8 ish .... fully charged
12.4 ish ..... half charge
12.0 for any length of time .... walking the line of goosing your battery.
K
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Salty Sea Dog Member of the Inner Circle
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Salty Sea Dog Member of the Inner Circle
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And the next post: The secret of good comedy - timing! 
Graham (G4FUJ)
Sold L44FOR 4/4 Giallo Fly
'11 MINI Countryman Cooper D All4
'90 LR 90 SW
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Joined: Feb 2016
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Needs to Get Out More!
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Needs to Get Out More!
Joined: Feb 2016
Posts: 8,657 Likes: 407 |
Update: 4 December 20
I haven't used Tarka for 8 or 9 days. When I parked the battery voltage was 12.6v.
Today it was 12.3v
So, I'm beginning to believe that the battery I had was faulty: this on holds its charge.
When it is at 12v I'll either drive the car or put the charger on.
Sorry Peter that's a bad policy. Leaving a lead/acid battery discharged to almost any degree for a length of time kick-starts the downward spiral of battery degredation through sulphation of the plates. FWIW Lithium Ion batteries on the other hand have best storage life when left in a cool environment charged at 40% of full capacity. I wouldn't be too complacent about your new battery either. Fair to assume it still has its advertised capacity so it's already lost around 20 amp hours in 9 days, well above typical natural discharge. When the capacity has dropped to say half, the same 20 amp hours discharge will have a far greater effect on remaining charge. Sorry to be so negative, just telling how it is.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Aug 2013
Posts: 15,794 Likes: 15
Formerly known as Aldermog Member of the Inner Circle
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OP
Formerly known as Aldermog Member of the Inner Circle
Joined: Aug 2013
Posts: 15,794 Likes: 15 |
The battery is now on charge....!! 
Peter,
66, 2016 Porsche Boxster S
No longer driving Tarka, the 2014 Plus 8...
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