Hello, as you all say, your phone has about 300-350 life cycles (li-lon batteries) and each time you plug it in, it takes away one life cycle and when you are out of life cycles, your battery starts to die, well I wanted to ask, when I sync music onto my phone plugging the USB data cable from my phone to computer, it automaticlly charges too, so does that mean every time I sync something on my phone to comp, I just used a life cycle?
I have never heard of that 300-350 life cycle thing. Li-ion batteries life cycles are dependent on how old they are and how often they are used. There is no set number to how many times you can charge it before it goes dead. Most cell phones and other portable devices have charge shut off circuitry that prevents over charging. But if you don't like your cell to continuously charge, I would suggest removing the battery after you plug it in and see if you can still sync to it.
If the port is broken, it won't charge regardless of the cable. Generally speaking, USB cables are able to transmit power, so with a normally working phone, it will charge while connected.
