These transparent AA to C battery adapters allow you to use readily available AA batteries in devices designed for the larger C size. Simply insert an AA battery into the adapter, and it will convert it to the appropriate C size, providing a convenient solution when you don't have C batteries on hand. The pack includes 4 adapters, ensuring you have enough for multiple devices. With a clear design, you can easily see when batteries need replacing. Lightweight and portable, these adapters are a practical choice for powering various electronics while on the go.