Are memory saver tools safe to use?

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Dennis - 21 Jan 2007 17:33 GMT

I've been looking at these memory saver tools, they use either a 9 volt or
12 volt battery source. They plug into the cigarette lighter and maintain
the computer, clock and radio settings when you disconnect the vehicle
battery.
I'm wondering if these things are safe to use without damaging anything such
as the cars computer system.
You would have to plug this thing in before you unhooked the battery so you
would be introducing another 12 volts into the system. Would doing this be
harmful? Which one would be better to use, the one that uses the 9 volt
battery or the 12 volt? I appreciate any help.

Thanks,
Dennis B

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HLS@nospam.nix - 22 Jan 2007 14:23 GMT

> I've been looking at these memory saver tools, they use either a 9 volt or
> 12 volt battery source. They plug into the cigarette lighter and maintain
[quoted text clipped - 9 lines]
> Thanks,
> Dennis B

Small bias batteries are often used to preserve the memories in devices of
this type.
The applications are low current, and using such a battery should cause no
problem.
Dont expect the memory saver battery to last for days.
If it were I, I would go for the 12 volt version, as that is nearer to the
auto's normal
operating voltage.

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MT-2500 - 22 Jan 2007 15:23 GMT

Dennis Wrote:

> I've been looking at these memory saver tools, they use either a 9 volt
> or
[quoted text clipped - 15 lines]
> Thanks,
> Dennis B

They work for a battery change.
As said 12 volt is better than 9 volt.
Also a old 12 volt fused power supply works good.
Or even a small 12 volt battery.
But memory savers are only safe for a battery change.
And do not short out your positive cable when changing battery.

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MT-2500

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