Sun-S Air-Conditioned Work Clothes RD9290 RD9291 x 2 Charger Thank you for viewing. I was using these until this year, but the fans started making unusual noises, so I am selling the battery and charger. Operation confirmed. Due to the nature of precision instruments, I cannot accept returns for defects during shipping. Please understand that this is a used item and is non-refundable and non-returnable.