Not bad for the price
Works as described. However if you're going to charge your phone from it, the USB only outputs charge when the crank is turning. It will not charge your phone from the battery on the lantern, but it will light the lantern with it.
When the crank is turning slow, I measured the USB outputs about 4.2 volts, and when it's turning fast it's 4.9 volts. So this is acceptable USB voltage that is regulated regardless of cranking speed. When the crank speed is zero, the USB output voltage is zero, even if the battery is charged.
April 01, 2019