Rechargeable batteries are brilliant, all the gadgets and feeds us gizmourile to walk without them I always throw their alkaline with caustic chemicals in the environment, and that would be pretty bad. However rechargeable batteries are adapters huge problem, plugs and cables we need to keep them filled with electrons. Oh! battery died, but where dr. with is the adapter? Sound familiar? One day an enterprising geek built in battery charger. And some loader, but has good idea to end: he used a standard USB port directly on the battery. Now, when your batteries are passed out, connect them to a USB port and ubiquitous entertainment continues!