Page "Electric boat" Paragraph 23
from
Wikipedia
* Lead-acid batteries may still be the most viable option at the moment ( 2008 ).
Deep-cycle, ' traction ' batteries are the obvious choice.
They are heavy and bulky, but not much more so than the diesel engine, tanks and fittings that they may replace.
They need to be securely mounted, low down and centrally situated in the boat.
It is essential that they cannot move around under any circumstances.
Care must be taken that there is no risk of spilled, strong acid in the event of a capsize as this could be very dangerous.
Venting of explosive hydrogen and oxygen gases is also necessary.
Typical lead-acid batteries must be kept topped-up with distilled water.
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