I pressed the button on the right side of the Fueltank Uno and four indicator LED lights lit up. I did not charge any of my devices immediately with it. First, I connected it to the wall plug and charged the device itself. It took about thirty-five minutes to fully charge. Once it was charged, all six LED lights came on, so I knew it was ready to go.
I used the charger device to recharge my mostly-dead iPhone 4 and my completely dead iPod Touch 4G. As I connected the USB adapter with the Fueltank Uno, another blue light lit up on its left side to let me know it was connected, which looked nice. The Callpod Fueltank Uno took about 60 minutes to charge my iPhone 4 completely, and about 75 minutes to charge my iPod touch 4G. At this point, two of the LED lights on the indicator were still on, so I connected an Aliph Jawbone Icon headset
for charging. The Fueltank Uno charged the Jawbone Icon headset for about 15 minutes before completely using up its charge.