Best DealsOriGlam 4Pcs AA to C Size Battery Converter, Battery Adapter Holder Case Battery Boxes Portable And Useful - This product include 4pcs battery converter, it can convert AA size battery to C size battery. Nothing complicated - Just stick 1 AA battery in the converter. Perfect for electronics and emergency situations. Convenient Perfect Set - A gadget to keep close at hand, at home, at the office, at the campsite, etc. Durable Hard Plastic - Material: durable hard plastic. Color: transparent. Option To Use - 1 AA or use 2 AA for more capacity. Perfect for electronics and emergency situations.