[Vwdiesel] Auxiliary Battery

Kevin Jack kevin.jack at primus.ca
Mon Apr 21 01:19:57 EDT 2003

Land Cruiser fanatic too, Roger??

I think it depends on the rating of the alternator. If you have a big
alternator in your 4x4 then you might not have problems. Maybe someone knows
the rating of the VW, or has done this already.

I run 2 batteries in my BJ-60 and HJ-60 Land Cruisers (but this is stock

----- Original Message -----
From: "Roger Brown" <r.c.brown at ieee.org>
To: <vwdiesel at vwfans.com>
Sent: Monday, April 21, 2003 12:05 AM
Subject: Re: [Vwdiesel] Auxiliary Battery

Kevin Jack wrote:
> I am new to the list, and I own a 1992 Volkswagen Jetta Turbo Diesel.
> I am wondering if anyone (most likely in Canada) has any ideas on how to
improve cold starts (sub -10C).
> I live in the city and will not be able to plug it in. If I dont find a
solution, I will be forced to store the car for the winter.
> One idea I had was to add an auxiliary battery with a solenoid switch
between it and the main battery. This battery would only be needed for cold
> Like this one: http://www.geocities.com/george_tlc/auxbat/switch.jpg
> The only concern I have is trying to keep both batteries charged. I think
charging them simultaneously is out of the question due to the stress put on
the alternator. I dont want to upgrade the alternator.
> Has anyone done this or have any ideas on if and how it could work best.

I run dual batteries in my 4x4, works well, no problems charging.

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