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Re: [Shop-talk] dead battery

To: Mike <>
Subject: Re: [Shop-talk] dead battery
From: nick brearley <>
Date: Wed, 15 May 2013 09:25:03 +0100
Cc: shop-talk@Autox.Team.Net
References: <2B5D5C3C7B7348308FCA2536BE93F932@Mike>
User-agent: Mozilla/5.0 (Windows NT 5.1; rv:17.0) Gecko/20130328 Thunderbird/17.0.5
Mike wrote:
> I have a 12v car battery that is dead as a doornail because the car hasn't
> been run in a long time.  It is also dry, or at least  very low.  So I filled
> the cells with distilled water, and hooked up the leads (the ground lead to a
> bolt on the engine), checked the charger to be sure it was set to 12v, and
> plugged it in.  Ammeter goes to max, and the charger trips out.  Suggestions?
> There is no adjustment on the charger, just plugged in or not.


You might try seeding the battery cells with electrolyte taken from 
another good battery. If the battery was dry then a fill of distilled 
water would make the charger unable to function, some acidity is needed 
for the reaction to take place. I am no electrical engineer but that has 
helped in the past. Once the battery has taken charge a pulse charger 
may help to restore its condition.

As Randall says you should be prepared to get a new one. It's debatable 
how much messing is worthwhile with a sick battery. These things always 
fail when they are most needed.

You might check the charging rate of the car. A battery doesn't usually 
dry out of its own accord when left unused, although if you're from 
Phoenix temperature may come into play.

Nick Brearley

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