Desirable product, but not without faults!,
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This review is from: Raleigh Moon Black Front and Rear LED USB Rechargable Bike / Cycle Lights (Misc.)
Very usable item due to its size. Can be easily removed from bike and kept in pocket , bag or house. Very bright light for its size. However, these lights offer very little protection in even a light shower. My rear light got wet in the lightest of showers and gave very intermittent results: would turn itself on and sometimes would not be able to turn it off!. My lights do not last longer than 2/3 hours, making long journeys in bad light a bit of a gamble. Lastly, they are difficult to charge on a laptop; the rubber cable gets in the way meaning you have to prop the laptop up.
In summary, I do not regret buying but would be very cautious about setting off in dark/damp conditions on a long ride.