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Old 09-22-2016, 11:46 PM   #31
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Very funny. But I have a question If you have gone to the trouble of putting batteries in a plastic battery box with a lid, why is rain/water getting into the battery box in the first place? Is that not the real problem here?
It comes in through the holes in the bottom.
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Old 09-23-2016, 04:35 PM   #32
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Originally Posted by Dustdevil View Post
Very funny. But I have a question If you have gone to the trouble of putting batteries in a plastic battery box with a lid, why is rain/water getting into the battery box in the first place? Is that not the real problem here?

Via vents in the cover:

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Old 09-23-2016, 05:27 PM   #33
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So then, what is the point of the battery boxes in the first place, if not to protect the batteries from rain, fallout, dust, ozone, wash water, etc? My battery boxes on my trailers were mounted outside in similar boxes, but without the top vents. They didn't have a problem with water in the boxes, and I never had to deal with putting holes in the bottom to drain out the acid formed by the mixture of the water with the effluent of charging and hydrogen outgassing. Sounds from here as if it would be better to deal with keeping the water out in the first place, no?
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Old 09-23-2016, 05:39 PM   #34
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Mine was vented on top for any off gassing from charging. It was in my opinion to protect the battery to some degree from sun and weather and not so much from a would be battery thief. Mine ended up full of water after some heavy rain and I was concerned the water across the posts might short the battery out so I drilled 2 holes in bottom of the box and had no other problems. Smarter venting might not have been a bad idea but seems to be the norm in mort of the boxes I have had in boats and campers. And the black tank story cracked me up
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Old 09-23-2016, 06:33 PM   #35
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I will never look at my batteries the same way again.
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Old 09-23-2016, 07:40 PM   #36
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Originally Posted by Rustysocket View Post
It comes in through the holes in the bottom.
You beat me to it...
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Old 09-28-2016, 07:02 PM   #37
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I drilled holes in the bottom of the battery box on the 26BH I recently sold to allow water to drain out. I will be getting my new 28BHBE near the end of Oct and drilling holes in the battery box will be one of the first things I do.

Note: I was out on a road trip about three years back and we had tons of blowing rain and needless to say the battery box filled up all they way to the top with water. The water was splashing all over the cables, top of the battery and spilling out of the box during travel. I immediately drilled holes in the bottom of the box to allow the water to escape.
I've had similar happen to me on a previous camper. Ended up corroding the thermistor and wiring feeding the battery, only found when needing the battery to power up. Long story, short, is that drain holes were promptly added after rewiring the battery box! As said above, many car batteries don't reside in hermetically sealed boxes...

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