yes your iphone would have to be lying out.
That's not true.
Quote from the tech specs says:
"When your iPhone is fully charged (or when it is not inserted), the Surge transfers the charge to its internal battery."
So it's developed properly

The trick is - it's always with your phone, not in some BOB bag. I'm just wondering why nobody (except for some Chinese crappy-phone clones) integrates solar panels into the phones yet?