Hello, Both of these units work fine by themselves, but when I try to charge the Mophie Juice Pack Plus with the Mophie Powerstation Duo, the power goes on and off every ~2 seconds, why does this happen? If I remove the case and plug the iPhone directly into the Mophie Powerstation Duo it charges fine, if I plug the Mophie Juice Pack Plus into the Apple 5W USB Power adapter, it charges the Juice Pack Plus properly. When I plug the Mophie Juice Pack plus into the Powerstation Duo, it does not power the Juice Pack Plus properly (the power goes on/off) repeatedly. Has anyone else run into this problem? I sent an e-mail to Mophie via their support page last week but haven't heard anything back yet. Justin.