battery life

hello i have just recived my sandisk iXpand and i would like to know what is the battery life users have been receiving and as time goes by will this device become useless as the battery storage ability decreases?


if the battery fails of the drive then it will not be detected by the apple devices anymore since it needs the power, about the battery life i tested the drive about 5 hours non stop with the iphone 6 and the battery only decreased about 2 percent, so i think that it has a very long battery life in general.