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CAr Battery "Capacitor" question....

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CAr Battery "Capacitor" question....

Old 10-28-10, 11:52 AM
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CAr Battery "Capacitor" question....

Hey all,

I am sure a few people here will be able to help.

I have a DVR / LCD Screen set up in the back of one of my cars - the combo works fine when running off of the battery and when the car is running.

However, when it's on and i start the car, the voltage drop causes the dvr and lcd to reset. I am assuming that this is doe to the power being drawn from the battery during ignition...

So, if I remember correctly, there are 'lightning tubes' or some sort of capacitor that stores energy so when the main car battery drops, the stored power is enough to take over for a few seconds until the car is started.

I would imagine that this is something I could just purchase, and install in-line with the current power source....

Anyone familiar with these. Would best buy sell them? Somewhere online?

Thanks in advance,

Matt!
Old 10-28-10, 11:55 AM
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Re: CAr Battery "Capacitor" question....

Either you aren't going the full 88mph, or you got a bad batch of plutonium.
Old 10-28-10, 12:29 PM
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Re: CAr Battery "Capacitor" question....

You need an upgrade

Old 10-28-10, 12:51 PM
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Re: CAr Battery "Capacitor" question....

I would just replace your battery with a higher current one. The voltage should drop less when the starter motor is engaged. Sounds like you may be headed for a new battery soon anyway.
Old 10-28-10, 05:10 PM
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Re: CAr Battery "Capacitor" question....

Do you live in your car?
Old 10-28-10, 05:36 PM
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Re: CAr Battery "Capacitor" question....

Originally Posted by NORML54601 View Post
Do you live in your car?
I'm asking myself that same question. The LCD monitor I can sort of understand but the DVR thing puzzles me. How do you get shows onto it?
Old 10-28-10, 08:51 PM
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Re: CAr Battery "Capacitor" question....

A capacitor would work but you'd need a pretty big one to power the DVD and screen (depending on just how much current the player draws) for a couple seconds. I'd guess at least 10,000uF and probably more. And you'd need a diode to keep the cap from trying to help start the car.
Old 10-28-10, 08:58 PM
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Re: CAr Battery "Capacitor" question....

folks with big booming system often have 2 batteries. and often a higher output alternator.
Old 11-01-10, 10:55 AM
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Re: CAr Battery "Capacitor" question....

Hey all,

Haha.... Thanks for the responses so far.... Just to clarify, I don't live in my car. It's a small, mobile DVR (records to SD card) and a small, 6 inch mobile LCD. I have a camera in the car that I record to the DVR - no cable tv here!

That being the case, there's very little draw as I can run them off of the battery for hours on end... it's just that when I start the car, they both shut off. Does anyone have any links?

@asabase - I was hoping to avoid the diode. Are there any units that have them built in?


Thanks,

Matt!
Old 11-01-10, 11:18 AM
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Re: CAr Battery "Capacitor" question....

I'd suggest getting a Optima battery.

http://www.optimabatteries.com/home.php

The one with the yellow top is going to be the best choice unless it won't fit in your stock battery position. And car stereo dealer should sell/install them.
Old 11-01-10, 11:19 AM
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Re: CAr Battery "Capacitor" question....

This place has a pretty good selection, that's all I know about them.

http://www.sonicelectronix.com/cat_i6_-capacitors.html
Old 11-01-10, 12:48 PM
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Re: CAr Battery "Capacitor" question....

Thanks all....

Nifty03, those are exactly what I was referring to....


I'll post back with an update when I install it....

Later,

Matt!
Old 11-02-10, 05:35 PM
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Re: CAr Battery "Capacitor" question....

You won't find any built in, but a diode is tiny. Minimal soldering job.

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