Battery vents

[vahunter]

im changing up some things on my boat and I putting one of my batteries in my rear seat. I have a sealed hatch on the end where the battery box will be. On the opposite end at the top maybe 24" away there are 2 holes where the seat was formed and welded to the hull. Also, alone the bottom of hull there are "holes" where the strakes are maybe 2 or 3 below the battery. is this enough ventilation for the batteries? Im guessing it isn't. If not where should a vent be placed?
I have an onboard charger so it will also be charged/maintained in the compartment and id rather not have leave the hatch open.

 

[vahunter]

heres a pic to get a better understanding. Battery will basically be underneath the port seat mount. The holes are on top next to the hull sides.[attachment=-1]uploadfromtaptalk1396932083426.jpg[/attachment]

 

[vahunter]

And heres a pic to see the strakes which are obviously below the battery. about half of the foam is replaced so it wont be quite as open in there.

 

[vahunter]

[attachment=-1]uploadfromtaptalk1396932443198.jpg[/attachment]

 

[Captain Ahab]

I think you will be ok - even after you foam it it will hardly be an airtight compartment.

You might want to just leave the hatch cracked during charging if it is a concern