I believe rechargeable batteries will never disappear; you don't have to throw them away for good. I know most people still use non-rechargeable batteries. What if these batteries run down? - They may get rid of them or they sometimes may forget whether some of them are dead. But think about it; what if they do both of them? - They will waste a lot of money before they know it! Therefore, extremely put, rechargeable batteries are in, while non-rechargeable ones are out. The former are good for nature and help us save a lot of money and reduce much garbage in the long run. This is eco-friendly, isn't it?