All these wires do is send current to the iPhone, if they catch fire, well the iPhone can be damaged.
They could also dissemble in the connector on the iPhone.
I used worse one than these, those tricolored found ar office depotmax for 5 bucks for my itouch
The cords break, but not the device.
You still use the iPhone g4?
I saw one today for $40, that would work with a Bose dock I have.