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fully draining battery?


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bassrider20hz 
Member - Posts: 40
Member spacespace
Joined: December 16, 2004
Location: United States
Posted: May 04, 2005 at 9:16 PM / IP Logged  

Hey wuts up everyone. I usually like to bumb my system while the car is off. 

this is what i do i listen to about 1 whole CD then i turn the car on for about 20 mins to charge the batery back. I was wondering is there any way that i know when there is enough juice in the batery to turn on my car any device, voltage meter,led??  i have a capacotor with digital voltage display can this help me. i have seen this item on crutchfield is there any similar poducts or any other things that i can do so i can know just when to turn on the car.? 

http://www.crutchfield.com/S-ytjdajKe7KV/cgi-bin/ProdView.asp?g=724&I=127BA3

Alpine Guy 
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Posted: May 04, 2005 at 9:32 PM / IP Logged  
There is a product that you can wire up to your cd player's ignition wire and when your battery gets to low it turns off your cd player before its too late leaveing enough juice to start your car.... however what you are doing it drastically reduceing the life of your battery, and alternator dischargeing the battery to low too much, and relying on the alternator to fully charge your battery.
2003 Chevy Avalanche,Eclipse CD7000,Morel Elate 5,Adire Extremis,Alpine PDX-4.150, 15" TC-3000, 2 Alpine PDX-1.1000, 470Amp HO Alt.
Captanham 
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Posted: May 04, 2005 at 11:07 PM / IP Logged  
if you have a voltmeter or anything you can tell, caps not really a good way to tell because that will jump all over the place with your system, you need something that is closer to the batery,,, running you'll have about 13.8 or 14.... sitting there off with nothing on you should have about 12.5, most decent batteries can still start a car down to around 10 or 10.5 volts, you can probably take it down to 9 or so and still start it,, BUT the more times you drain a battery and charge it back up, the shorter the life of the batery are, and this also probably isn't good for your alternator,
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bassrider20hz 
Member - Posts: 40
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Joined: December 16, 2004
Location: United States
Posted: May 04, 2005 at 11:40 PM / IP Logged  

ok thanks everyone thanks for your help.

i dont do you think that this can hurt my optima yellow top? isnt it meant to be charged and discharged over and over again? and would my altenator still mess up and die if i get one of those high output alternator?

thanks everyone.

Markland556 
Copper - Posts: 75
Copper spacespace
Joined: March 18, 2005
Location: United States
Posted: May 05, 2005 at 12:26 AM / IP Logged  
my battery is a piece of junk, if i leave my stereo on (pioneer with 4 alpine speakers) i have to use a jumper box to start my car.fully draining battery? -- posted image.
sedate 
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Joined: July 03, 2004
Location: Colorado, United States
Posted: May 05, 2005 at 3:02 AM / IP Logged  
With an Optima Yellow, you're in good shape to drain that puppy down like you're doing.
That is the *only* battery I would do that with, however.
Naww, if you're not having any problems doing what your doing, don't worry about an HO alt or whatever any furthur. Optima Yellows can put out like 30-amps for 2 hours before dropping below 10.5v .... depending on the system your running you might not even be scratching the surface of that kind of storage in 20 minutes. What kinda amps you running anyway?
"I'm finished!" - Daniel Plainview
bassrider20hz 
Member - Posts: 40
Member spacespace
Joined: December 16, 2004
Location: United States
Posted: May 05, 2005 at 11:42 AM / IP Logged  

Thanks a lot   sedate  and all you guys. really helped me a lot.

by the way  the i am running a 1200watt amp. its a power acoustic spl series amp.

Captanham 
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Posted: May 05, 2005 at 12:41 PM / IP Logged  
yea, the optima is a different story than other bats, that's what they are ment for. HOWEVER, i had the guy at stinger tell me (and i think he might have just been talking shhh) that if you drain optoma's 100% like a few times they are dead, but no matter what, going down to 10 volts or so should be fine for you with a yellow top
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