Most portable CD players use AA batteries (some are rechargeable and some not). While modern technology often overshadows these classic devices, battery powered CD players remain a reliable choice for those seeking portability, simplicity, and uninterrupted listening. Disposable batteries, like AA or AAA, are convenient as they can be easily replaced when they run out of. . I suggest to use your computer to transfer the CD audio to a USB memory stick, and then plug that directly into your car radio. My top pick is the Sunoony Walkman CD Player, Portable CD Player. It's designed for versatility, supporting both standard CDs and MP3s from SD cards. A reliable power adapter ensures that your device runs smoothly, allowing you to focus on the music instead of worrying about battery life. In this article, we'll delve into a. .