DC/DC 3.5-30V to 4.0-30V Booster Converter Step Up Voltage Regulator LM2587
Does what it's supposed to do! Pretty nifty thing to have around if you ask me! If you use more than 2 amps of current, a little whine is audiable but still works good. Just remember, if you use too much current for too long it will eventually burn out.