Originally Posted by The Dan of Steel
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.
Yessir, that's part of what they fixed in the new version, the HP-1 # (sharp).
HP-1 # (sharp)
Unlimited Headphone Amp Usage While Charging
With the i.Fuzen HP-1 #, you can use the headphone amp while the HP-1 charges.When working at your computer (for example), this enables you to enjoy continuous, unlimited music listening through your iPhone.
Longer Headphone Amp Usage
While the headphone amp is active, the i.Fuzen HP-1 # does not charge the iPhone. While commuting, you will enjoy longer headphone amp usage.
Auto-Off Extends Battery Reserves
To extend battery reserve power, the i.Fuzen HP-1 # switches off after it has fully charged the iPhone. Whenever the iPhone battery seems low, simply switch the i.Fuzen HP-1 on again to begin charging.
No Headphone Amp Usage While Charging
With the original i.Fuzen HP-1, you cannot use the headphone amp while the HP-1 charges.
Headphone Amp Usage Does Not Disable Charging
While the headphone amp is active, the original i.Fuzen HP-1 continues to charge the iPhone.
The original i.Fuzen HP-1 stays on after it has fully charged the iPhone.
Mine arrived today and just finished its initial charging session, so I can't yet confirm whether I'm one of the "customers who feel those newer features are nice but not necessary", but I figured it'd be worth a shot at that price.
Edited by PsychicPickle - 3/11/13 at 5:31pm