Yep I charged my prs350 for over an hour (from 1/4 bars to 4/4 bars).
Some devices do require the data lines tied to a particular voltage to charge. I didn't try this with my prs350 because it seems just tying the two data lines together is sufficient.
I had less success recharging the battery in the solar charger from the sun - seems to need at least 2 days sun.
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