Bought one of these months ago to power a portable speaker box that I built. This thing will run the small amp board and 2 speakers for DAYS without needing a recharge. I've used it off and on for about 2 weeks and it still has juice left in it. I found some matching power connectors at radio shack and wired up the pack so I could have it plugged into power while still running my speakers or all on its own without having to unplug anything.The build quality is not the greatest in terms of how the jacks an
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