Unfortunately, while the FiiO E7 works with the iPad (and bypasses the iPad DAC), the FiiO E17 does not work with the iPad.  The USB port via the Camera Connection Kit does not have enough juice to power the FiiO E17.  

Typically, you can bypass the iPad DAC by getting the Camera Connection Kit and connecting the iPad to an external DAC via USB.  This works with the FiiO E7.  Unfortunately, the iPads do not have enough juice to power the FiiO E17.  I have not tried it with a powered USB connection though.  

  Quote:   The E7 costs USD94 in Thailand and the E17 costs USD129. The difference in price is not significant but the E17 trumps the E7 hands down in terms of SQ and versatility.   I bought a second hand E7 as I was already using the E11.  Solely in terms of being a portable amp...

For those who are interested in prolonging the life of their Li-ion battery, this is an extract from an article in the internet :   A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation...

  Quote:   Hey everybody... I am new to this forum and am from Bangkok, Thailand. I got the E17 about 2 weeks ago and I must say that the E17 is AWESOME!! You can buy the E17 in Thailand for about USD130 and you will receive the E17 the next day after making payment.   As for your...