Additional Details ------------------------------ Bullet point: ?Please ensure both model and battery part number are matched with your device before purchasing( you can find related information in product description). If you are still not sure whether the model matches, please contact customer service. Product description: ?JIAJIESHI? JIAJIESHI is a brand focusing on sell battery, we aim at supplying high-quality professional battery products. ?Fit for Brand:Tri-Tronics ?Fit Model: Flyway Special XLS, Pro 100 XLS, Pro 200 XLS, Pro 500 XLS, Upland Special XLS ?Compatible Models: 1157900, 1157900-C ?Notice Before Purchase - Be carefully check the model number of your device and the part number of your original Battery to see if this Battery is compatible with your device. - A new battery will achieve its best performance after 2 or 58 complete cycles of charge discharge. - When you install it, be sure the connector has been properly connected to your device. - Do not use low quality third-party adapter charger to charge your device, that will shorten the battery's life. ?Contact us If you have any questions or any issues when using our product, please send us a message, we will reply you as soon as possible.