I did some quick tests and pulled from the source at 5.1V to 0.4A. No problem. Leave the battery connected to the output when the input voltage was off, no problem. Screw terminals do not work with very fine wire (less than 22 strands) but are otherwise acceptable. The potentiometer adjustment works well, with good hundredths of a volt control; While I haven't tested below 11V or above 19V yet, I plan to update this review after further testing.
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