rechargeable batteries anyone?

When I was still a kid I always buy some AA batteries for my discman because at that time rechargeable batteries are not yet invented. When I knew about the AA batteries already have the rechargeable ones, I didn’t hesitate to buy aa rechargeable batteries for myself because I’m kinda miss listening to my discman which my mom bought for me last 10 years ago I think. I will no longer buy the ordinary batteries because I now have the rechargeable ones and that means I don’t have to worry about having battery low.