Use 24 hours a day. Charge with solar power by day and dynamo power at night.
Itís a Bird, itís a Plane - no, itís a wonderful new portable air conditioning unit. It looks small but will cool an 1800 sq. foot area. Just kidding. It WILL keep you cool under the hot sun. The solar panel needs to have direct exposure to the sun, and will work until you take it out of the sun.
No need to replace batteries, crank to generate power. Comes with built-in cell phone charger, earphone jack and USB attachment.
Excellent sound fidelity for a small, compact radio powered by you. A few turns will give you time to listen to the AM/FM Radio or use it to light an area or to charge other small hand held items like cell phones.