On Fri, May 28, 2010 at 09:31:03PM +0100, Folderol wrote:
An Optima or other AGM car/boat battery would work well, but they are pricey and HEAVY.
There are large Li/Ion batteries available that might work, designed for electric bicycle applications, but they tend to run at 24v or 48v or some odd voltage.
Or, you could just buy a Crate busking amp. Those things are A/B amps (I think) can run forever on a few D batteries.
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