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Old 07-09-2011, 06:49 PM
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gregbradley
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Join Date: Feb 2006
Location: Sydney
Posts: 18,185
Yeah what you want is a deep cycle battery. That means capable of a continuous draw at the stated rating as opposed to car batteries which as already mentioned are designed for a short burst.

They are a bit more expensive.

There are also the gel ones that are not sensitive to having to be upright.

Greg.
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