Bought this in May only used the umbrella 2 times, since the summer months were extremely humid the umbrella was not in use. First week of September (Labor Day 2021) the evening was cool cranked the umbrella to turn on the lights for the evening and behold NOTHING! Changed the battery made sure the connection was good and still NOTHING! This may be a problem with most solar umbrellas since they are suppose to work with sunlight. With that said I personally would NEVER purchase a large item with solar lights, apparently they tend to be temper-mental. The Umbrella is fine and unfortunately I cannot return the product. So I'm going to find a way to add lights that are durable, but give caution to be prepared to be disappointed in the long run. HTH's