Hello Vlad, Here is the answer from our technical department. As most of electronics devices using "batteries", it's recommended to remove batteries from lamp for prolonged stotage "Prolonged storage" means several months. Our products are designed to have a consumption (OFF Lamp) the lower is possible. I'don't know how long is the storage time in your case. If it is less than 6 months, don't hesitate to contact our After-sales service. "even if the lamp has been used only a few times" : we need to have the duration of your use to have a better analyse. Thank you for your support


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