Thank you for your participation in the GAW! Regarding the battery, you’re correct that it is replaceable. However, please note that it must be our custom-made battery to ensure compatibility and performance. Currently, we don’t offer separate sales of these batteries. If you encounter any issues with your battery, please feel free to get in touch with us. We’ll be more than happy to provide you with a replacement free of charge. Your satisfaction and experience with our product are our top priorities!