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second battery for audio


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04nata 
Copper - Posts: 358
Copper spacespace
Joined: April 22, 2008
Posted: February 03, 2014 at 3:42 PM / IP Logged  

Was at Sam's Club and seen some Energizer AGM batteries.

Does anybody have experience with these?

2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: February 03, 2014 at 9:11 PM / IP Logged  
I get worried when I read crap statements like 'Valve Regulated Lead Acid (VRLA) batteries reduce water loss even in high heat conditions'. (As if an AGM will cut cooling and windscreen washer water losses!)
I generally hear great things about Kinetik & Deka which are reasonably priced. I also like Yuasa.
And the choice of battery depends on desire and sizer of the audio. EG - if you want the highest SPL you'd probably want wet cells instead of AGMs.
04nata 
Copper - Posts: 358
Copper spacespace
Joined: April 22, 2008
Posted: February 03, 2014 at 9:30 PM / IP Logged  

But, wet cells, (standard batteries) emit gas correct?

So they are not for in car use?. I am getting a bit confused by it all

2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: February 03, 2014 at 10:19 PM / IP Logged  
It depends...
A wet cell can be housed internally provided it is in a vented sealed enclosure. But most use AGMs to avoid that hassle or because they think AGMs are the best.
If you are confused about my first line, since AGMs do not have water, how can they "reduce water loss"? It is a completely bullsh line.
Just be aware that AGMs are more expensive and have poor tolerance for excessive discharge and overcharging.
And please use an isolator but don't get conned by the crap that "smart" or "intelligent" battery isolator sellers & agents claim.
04nata 
Copper - Posts: 358
Copper spacespace
Joined: April 22, 2008
Posted: February 04, 2014 at 7:39 AM / IP Logged  
So as long as I have the battery in a sealed box, with a single vent to the out side then I'm good?
How big of a hose for venting would I need?
2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: February 04, 2014 at 5:50 PM / IP Logged  
AFAIK yes. Maybe the specs vary as do regulations.
In theory it should vent upwards and maybe require two vents (in & out) unless it's a large vent, but knowing some specs it wouldn't surprise me if a tiny bottom entry tube angled forwards is acceptable in some regions or competitions.
04nata 
Copper - Posts: 358
Copper spacespace
Joined: April 22, 2008
Posted: February 04, 2014 at 6:03 PM / IP Logged  

So if I had 2 of these, I would be good to go? I will be pushing 2360 watts max, and will not always be playing with the car off, but want the reserve power

second battery for audio -- posted image.

Or would 1 be sufficient?

2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: February 04, 2014 at 6:27 PM / IP Logged  
Sufficient for what?
04nata 
Copper - Posts: 358
Copper spacespace
Joined: April 22, 2008
Posted: February 04, 2014 at 6:32 PM / IP Logged  

oldspark wrote:
Sufficient for what?

"I will be pushing 2360 watts max, and will not always be playing with the car off, but want the reserve power"

I currently have the stock autozone battery and run 1360 watts, have no issues with dimming or play time but am increasing my wattage by 1000, all still at 2ohm

2004 Hyundai Sonata
Kenwood KDC-X599 HU
2-Sundown X-18D4
2-SQ Q4500.1
2-SQ Q90.4
1-Massive DBX4
8-Niche 5.25 mids
8-Niche Tweeters
4-Skar 8" mid-bass
OhioGen 220a alt
OhioGen 350a alt
156.0
oldspark 
Gold - Posts: 4,913
Gold spacespace
Joined: November 03, 2008
Location: Australia
Posted: February 04, 2014 at 6:39 PM / IP Logged  
Not enough info.
I presume you do not mean sufficient to run at 14.2V etc since you have not provided alternator specs and stated that the car will not always be running, hence you mean <12.6V.
You have not stated what time reserve you want, nor at what power. (Nor if battery life is an issue.)
If you want to prevent dimming, use a battery or cap for the headlights etc.
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