>>462407>Nokia Portable Solar Charger, DC-40>With one minute of charging, consumers will get approximately two minutes of talk time.>The solar charger is most efficient when used in direct sunlight where the average charging time for full charge on a 1000mAh battery would be under four hours.It isn't too bad for the size (6.5" x 9.3"), but It'll be great when cell phones have the solar panels efficient enough to be small enough to be integrated right to the back of the phone itself.