[tsac]

You have discovered the problems with micro and mini USB sockets. If users dont treat the electronics with care and subject them to "abuse" then you will see connection issues. The pins will bend if users wiggle the connector when pushing it into the socket. Not much you can do except try to educate them. As for the battery going dead, this is not a good thing to allow with LI batteries. LI batteries will not recover fully and eventually completely die is allowed to constantly drop below 20%. Generally the cable will be the part that goes bad but either can fail.