There are plenty of PDF readers for the iPhone. It's been one day, give it a little time for other rescaled pdf readers to show up.
Oh and Goodreader is only $1 at the moment and well worth the money regardless of how much you've already spent.
The charging issue is more likely not enough power being supplied to your usb ports - it can vary depending on model and year it was made. This isn't a little device so takes a lot of juice. You could try using a dual usb power plug - some usb hard drives come with them for this exact same fact.
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