[PSUBS-MAILIST] inside battery

[Alec Smyth via Personal_Submersibles]

Hi Hank,

Certainly the battery of choice for the inside would be AGM, but on the
other hand plenty of subs had lead acid batteries inside the hull for eons
before AGMs were invented (everything from military subs to K250s). So if
it were me I'd use the lead acid batteries as an initial test just as you
proposed, but replace with AGM when it's time to replace them. As for the
oil, it serves no purpose inside the cabin as I presume it was just for
pressure compensation. Why not just drain the boxes to save weight? I don't
see the oil as presenting a danger, but it does present a danger of
messiness.

Best,

Alec

On Mon, Feb 20, 2017 at 11:13 AM, hank pronk via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Hi all, I may have made a bad judgment call, I added batteries to Gamma
> and was intending to put them in the escape pod.  I decided to just put
> them in the back of the hull instead.  I borrowed the batteries from
> Elementary 3000, they are lead acid in a fibreglass box, flooded with oil
> with a bladder top.  To my mind they are safe because they are flooded with
> oil.  At the same time, are they dangerous because they are flooded with
> oil.  I can's see why they are dangerous, but at the same time, I know
> people talk about the danger of oil in a sub.  I am not sure why?  I don't
> want to invest in AGM batteries yet because I am not totally confident I
> will be happy with the range.  I think I might need a diesel engine.  I
> have worked out the diesel engine idea but it is a 10K investment.  That is
> why I want to give batteries a try first.
> What to do?
> Hank
>
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