Using Automotive battery charger as a power supply? - RC Groups
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Nov 13, 2003, 04:01 AM
DRR
DRR
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[EFLT] Using Automotive battery charger as a power supply?


This message from "DRR" <astronut@cinci.rr.com> brought to you by EFLIGHT!

I have read and heard that this should not be done, that it may damage the charger. Why is this so?

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Nov 13, 2003, 05:14 AM
radar jammer
Greebe's Avatar
because it produces spiky power in so much as it'll tear up the electronics due to being totally unfiltered and half wave rectified. Lead acid batteries don't mind this, but it's next to the worst thing you could do.. the worst would be powering a charger with raw AC
Nov 13, 2003, 07:02 PM
Pete Foss
Pete Foss
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Re: [EFLT] Using Automotive battery charger as a power supply?


This message from Pete Foss <petefoss@yahoo.com> brought to you by EFLIGHT!


--- DRR <astronut@cinci.rr.com> wrote:
> This message from "DRR" <astronut@cinci.rr.com> brought to you by
> EFLIGHT!
>
> I have read and heard that this should not be done, that it may
> damage the charger. Why is this so?
>
>


Because there is not enough filtering of the original AC power. You
can usually run a airplane battery charger off a battery that is being
charged however. That will smooth out the power to the airplane charger.

=====
Pete Foss
Skymasters RC of Michigan
http://www.skymasters.org

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Nov 13, 2003, 07:02 PM
B12Boy@aol.com
B12Boy@aol.com
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Re: [EFLT] Using Automotive battery charger as a power supply?


This message from B12Boy@aol.com brought to you by EFLIGHT!

It depends on the charger as well. Some are more tolerant of imperfect DC
power than others. I ran my hobbico mark2 charger on my car batt charger for
over a year with no problems other than the fact that since the car chargers
output was not voltage regulated, if I put too high a load on it, ( fast
charging) the car chargers output voltage would drop too far and cause the hobbico
to blow its own fuse.

Slow charging worked fine however.

I'm now using one of the cosel power supplies and no longer have that
problem. $19 well spent IMHO. <A HREF="http://ramboy.com/cosel.htm">Al-Tech</A> Nice to be able to fast charge at home.


Dean in Milwaukee


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