A Universal Charger for AA, AAA, C, D, and 9V rechargeable batteries is a versatile charging device designed to charge multiple battery sizes. This charger can accommodate a range of common rechargeable batteries, making it convenient for users with various battery-powered devices. It typically features multiple slots for charging different battery types simultaneously and may include built-in safety features such as overcharge protection, short-circuit protection, and LED indicators to show charging status. Ideal for those looking to reduce battery waste, this universal charger is a practical solution for keeping rechargeable batteries ready for use across various household, personal, and electronic items.