This is the smallest size possible for memory cards and they have been designed so they can fit into smartphones the memory card sdhc requires very little power which saves the battery time on your smartphone the tiny size 11 x 15 mm makes the micro sdhc memory card the smallest possible external memory device ideal for use in gps devices mp3 players digital cameras and pdas if you want to use it in a sdhc slot you can only use it when you also use the sdhc adapter which simulates a sta