USBC rechargeable Battery Case Attachment For AIWA HS-P202 HS-P20 Built-in lithium battery, mainstream type C charging port, playback time is about 10 hours. The red light turns on when charging, and the green light turns off when full, and it supports charging while listening. The buckle is tight and will not fall off. The detachable structure allows you to replace the battery when it is old. Dear customer, I'm sorry, because 3D printing is not as perfect as traditional plastic products. If you receive the items and have any questions, please leave a message to me. Please don't worry, the items are guaranteed, thank you 3D printing material can withstand high temperatures up to 65?, 149? please pay attention to the temperature