These issues come from the fact that the battery is glued in place, while essential components such as the Lightning cable socket and volume rocker have been soldered to the motherboard. Considering that the Lightning socket is accessed frequently to charge the device and to transfer media, and that the volume rocker is used often to adjust the volume, it is not a stretch of the imagination to think that these are some of the more often used components. In turn this means that they could be more prone to wear and tear and if they are soldered directly onto the motherboard, then this might prove tricky not just to repair, but also to replace. In any case for the full teardown, head on over to iFixit’s website for the details.