Features: 1.Multifunctional : Can store two SD memory cards and three batteries at the same time. 2.1:1 Perfectly Suitable :Same size as the original battery, suitable, assured to use 3.With Battery Marking : Help you to record clearly and easily to see whether the battery has been used 4.Moisture-Proof and Scratch-Proof :Effectively protect the battery, prevent damage to the battery caused by damp and solid objects. 5.Mini and Portable : Can be easily put into a backpack without taking up space.