If you are looking for a good table fan, then the Lobel AC/DC Table Fan is ideal. It has double duty fan with LED emergency light that comes with double battery and 10 watts panel. In the event of AC power cut, the DC fan can run for 4 hours with high speed and 6 hours with low speed.
You need 8 to 10 hours for charging, while it can be kept for 70 hours for emergency lighting. It has built in AC/DC self-shifting circuit.