Seat Box Restoration - Defender Source
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  #1  
Old March 7th, 2016, 11:19 PM
RBBailey
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Seat Box Restoration

Is there any particular reason why the battery box under the seat should not be sealed as well as possible in the corners and such?
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  #2  
Old March 8th, 2016, 09:14 AM
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Ventilation is important along with heat dissipation.
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  #3  
Old March 8th, 2016, 09:45 AM
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Ventilation for what? Heat?
My seatbox doesnt have any working vents?!


.
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  #4  
Old March 8th, 2016, 09:51 AM
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Quote:
Originally Posted by Nomar View Post
Ventilation for what? Heat?
My seatbox doesnt have any working vents?!


.
For the battery... Batteries release Hydrogen gas during charging

------ Follow up post added March 8th, 2016 09:58 AM ------

Should have added that Hydrogen is not toxic... but at high concentrations is a highly explosive gas.
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  #5  
Old March 8th, 2016, 10:04 AM
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Think Hindenburg.
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  #6  
Old March 8th, 2016, 10:06 AM
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Only if you are not using a sealed battery. Anyone that wants a sealed battery compartment should used sealed batteries.
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  #7  
Old March 8th, 2016, 10:15 AM
The Dro
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Originally Posted by Red90 View Post
Only if you are not using a sealed battery. Anyone that wants a sealed battery compartment should used sealed batteries.
Sealed batteries are not really "sealed". The caps have pressure valves.

------ Follow up post added March 8th, 2016 10:18 AM ------

Sealed batteries still produce Hydrogen... it's significantly less but still produce it.
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  #8  
Old March 8th, 2016, 10:20 AM
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Quote:
Originally Posted by The Dro View Post
Sealed batteries are not really "sealed". The caps have pressure valves.

------ Follow up post added March 8th, 2016 10:18 AM ------

Sealed batteries still produce Hydrogen... it's significantly less but still produce it.
The valves only release in the event of catastrophic overcharge. They normally do not vent. as long as your charging system is working normally, there will be no venting.
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  #9  
Old March 8th, 2016, 10:20 AM
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I use a dry cell battrey.

Of course, being a seatbox, there is also the methane gas consideration....


.
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  #10  
Old March 8th, 2016, 10:23 AM
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Quote:
Originally Posted by Red90 View Post
The valves only release in the event of catastrophic overcharge. They normally do not vent. as long as your charging system is working normally, there will be no venting.
True... But this is a Rover battery.

------ Follow up post added March 8th, 2016 10:24 AM ------

Quote:
Originally Posted by Nomar View Post
I use a dry cell battrey.

Of course, being a seatbox, there is also the methane gas consideration....


.
I'd be more worried about carbon monoxide
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  #11  
Old March 8th, 2016, 10:53 AM
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Originally Posted by Red90 View Post
The valves only release in the event of catastrophic overcharge. They normally do not vent. as long as your charging system is working normally, there will be no venting.
Because LR electrical systems are known for their quality and reliability? SMH
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  #12  
Old March 8th, 2016, 11:44 AM
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If the battery overcharged to the extent that the pressure relief valve blew, you have a lot more to worry about than a bit of hydrogen in the battery box.
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  #13  
Old March 8th, 2016, 11:58 AM
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I don't think Hydrogen has been coming out of modern car batteries for decades, ever since the SLA was invented...like in the 70's. I guess there are lots of folks on this board in their 50's or 60's so they probably caught the tail end of the demise on the non-SLA.

That said, hydrogen can't be held in by much anyways due to the size of the atoms. Especially not a Defender seatbox, even if you caulked every seam with gallons of epoxy or silicone.

My opinion is that you don't want to seal anything on the ground floor of a Defender that well, especially the steel battery box. Anything sealed well holds water and the requisite ions, which in turn leads to corrosion.

My battery box has holes in the bottom anyways for the battery tie-down. Some dust gets in there, but that's easily hosed out, which has to be done regardless.
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  #14  
Old March 8th, 2016, 11:59 AM
The Dro
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Quote:
Originally Posted by Red90 View Post
If the battery overcharged to the extent that the pressure relief valve blew, you have a lot more to worry about than a bit of hydrogen in the battery box.
You clearly have no idea... it only takes 1-2 psi

Unless Canadian batteries are filled with Unicorn tears and made out of unobtainium metal plates
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  #15  
Old March 8th, 2016, 12:03 PM
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I would explain, but you guys just want to randomly argue.... Do whatever you wish.
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  #16  
Old March 8th, 2016, 12:04 PM
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  #17  
Old March 8th, 2016, 12:04 PM
The Dro
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Quote:
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Pass the popcorn!
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  #18  
Old March 8th, 2016, 12:08 PM
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  #19  
Old March 8th, 2016, 12:10 PM
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As for gas check valves, do they actually exist in SLA car batteries? I thought they just depended on hydrogen permeability to let evolved hydrogen gas escape. If they have valves, I have no idea where they would be located as I've never seen one on the surface of a battery.
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  #20  
Old March 8th, 2016, 12:13 PM
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