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 Post subject: Winter battery maintenance
PostPosted: Thu Nov 05, 2020 10:30 am 
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Joined: Tue Oct 06, 2020 11:38 am
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Location: Bristol/Somerset
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Hi all

As we approach the colder weather, I thought I would pop a charger/trickle charger on the battery to keep it topped up over the winter.

Having finally got to the battery, it seems like a bit of a faff to route the charger cables through the drivers side window so I can close the boot (to prevent the interior lights from staying on now I've fixed them), so I was curious to know what other people do, aside from taking the car on a few trips, to keep their batteries topped up?

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 Post subject: Re: Winter battery maintenance
PostPosted: Thu Nov 05, 2020 10:41 am 
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Joined: Sun Nov 04, 2007 8:43 pm
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Hardwire a flylead direct to the battery & lead it to a connector. Leave the connector up by the edge of the bonnet or elsewhere. Plug & unplug battery conditioner as required. As used by ever OPC for a start.

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 Post subject: Re: Winter battery maintenance
PostPosted: Thu Nov 05, 2020 11:12 am 
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tr7v8 wrote:
Hardwire a flylead direct to the battery & lead it to a connector. Leave the connector up by the edge of the bonnet or elsewhere. Plug & unplug battery conditioner as required. As used by ever OPC for a start.


You run a flylead from the boot to the bonnet? Or is the battery in the front in your car?

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1991 (H) Porsche 928 S4
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2018 (67) BMW X5 30d (daily driver)

Follow my bits of restoration on the 928 on Twitter at @928_UK


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 Post subject: Re: Winter battery maintenance
PostPosted: Thu Nov 05, 2020 11:47 am 
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Didn't realise it was a 928. I wrote assuming it was a 9xx with battery in the frunk.
No, just run it to an accessible point where you can easily plug in a conditioner & you don't have to dismantle anything.

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 Post subject: Re: Winter battery maintenance
PostPosted: Fri Nov 06, 2020 10:15 am 
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On my 968 there is a join in the boot rubber seal with a narrow gap it just made for the lead from the battery (boot mounted) to the trickle charger. Shut the boot, lock the car plug the charger in.

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 Post subject: Re: Winter battery maintenance
PostPosted: Fri Nov 06, 2020 6:39 pm 
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Your 928 has a jump post front RHS of engine bay, under blue threaded cover. Connect the maintainer there and to convenient ground (Allen bolt for cross brace is handy) with the supplied croc clips. The bonnet will close on the leads with no stress, or just leave it not quite closed and they’ll be no additional drain or lights on.

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 Post subject: Re: Winter battery maintenance
PostPosted: Mon Dec 14, 2020 11:54 pm 
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stratfordshark wrote:
Your 928 has a jump post front RHS of engine bay, under blue threaded cover. Connect the maintainer there and to convenient ground (Allen bolt for cross brace is handy) with the supplied croc clips. The bonnet will close on the leads with no stress, or just leave it not quite closed and they’ll be no additional drain or lights on.


Just got around to doing this, so wanted to say thank you for the guidance.

I also had the surprise of finding the under-bonnet light too!

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In my garage:
1991 (H) Porsche 928 S4
2010 (10) BMW Z4 35i
2018 (67) BMW X5 30d (daily driver)

Follow my bits of restoration on the 928 on Twitter at @928_UK


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 Post subject: Re: Winter battery maintenance
PostPosted: Tue Dec 15, 2020 12:56 pm 
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Glad to help Alex, and yes that under bonnet light is another thoughtful 928 touch along with the chilled glovebox!

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