They are tricky with the picture here, but the battery slot is tiny, the battery hangs off the back and doesn't click into place in any way. If you use the extended battery, which is a popular item for the Blackjack, the phone won't fit in the cradle. And it has two cables hanging out of it, one is an attached USB cable, then the other is the 5 pin USB AC adapter, which can be removed. Not well thought out at all.