As some may know the I.Fuzen is on sale on eBay for $20. This thing is great especially at that price. My question is I can't figure out how to get the amp only without juicing the phone. They say just hold the amp button for 2 seconds but when I do that it starts the amp and the charge icon on the iPhone. If I hold the battery button it does nothing until I turn off the amp first. Any one have a clue? Thanks.
That's just the design of the amp.