Features:brand new and high qualityThe AA battery holder is a set of 4pcs professional and practical battery adapter converter cases, which are specially used to convert any size AA to size C battery for use. Just put 2 AA batteries into the converter, it will function the same as a C-size battery.The battery storage box made of environmental material, harmless to your for health.The battery converter box is small and compact,easy to carry.With battery limit slot to fix the battery in a good place.for Ideal for electronics and emergency situations. Specifications:Material:PPSize:Approx.5x2.6cm/1.97x1.02inNet Weight:24g Note:Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:4x Battery Converter