I go this product, charged it overnight, and turned it on the next morning. The light is very bright and impressive (so that's worth a star); however, after 20 minutes I turned the light off, and when I went to turn it back on the light flickered for a second before turning and staying off. I don't know if the battery is defective or the device itself, but I'm returning it for a refund. This is quite disappointing as the work light got great review. I decided not to get a replacement because…